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techtalk:ref:svcproc22 [2019/01/05 23:11] hippysmack [Find Compression Using a TDC Whistle] |
techtalk:ref:svcproc22 [2024/01/22 21:00] (current) hippysmack |
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| [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | ||
| - | ====== REF: Troubleshooting - Engine - 05 ====== | + | ====== REF: Service Procedures 22 ====== |
| ====== Finding TDC of the Piston ====== | ====== Finding TDC of the Piston ====== | ||
| ==== True TDC ==== | ==== True TDC ==== | ||
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| By using these steps, some have found that their factory TDC mark on the flywheel was not centered in the timing hole. (it happens). \\ | By using these steps, some have found that their factory TDC mark on the flywheel was not centered in the timing hole. (it happens). \\ | ||
| - | [[techtalk:ref:trouble05#accuracy_of_true_tdc_using_only_a_dial_indicator|Accuracy of True TDC Using Only A Dial Indicator]] \\ | + | [[techtalk:ref:svcproc22#accuracy_of_true_tdc_using_only_a_dial_indicator|Accuracy of True TDC Using Only A Dial Indicator]] \\ |
| - | [[techtalk:ref:trouble05#find_true_tdc_using_a_dial_indicator_and_a_degree_wheel|Find True TDC Using a Dial Indicator and a Degree Wheel]] \\ | + | [[techtalk:ref:svcproc22#find_true_tdc_using_a_dial_indicator_and_a_degree_wheel|Find True TDC Using a Dial Indicator and a Degree Wheel]] \\ |
| - | [[techtalk:ref:trouble05#find_true_tdc_using_a_piston_stop_and_a_degree_wheel|Find True TDC Using a Piston Stop and a Degree Wheel]] \\ \\ | + | [[techtalk:ref:svcproc22#find_true_tdc_using_a_piston_stop_and_a_degree_wheel|Find True TDC Using a Piston Stop and a Degree Wheel]] \\ \\ |
| ==== TDC on the Compression Stroke ==== | ==== TDC on the Compression Stroke ==== | ||
| Line 20: | Line 20: | ||
| This is often referred to as TDC on Compression Stroke or TDC Compression. \\ | This is often referred to as TDC on Compression Stroke or TDC Compression. \\ | ||
| - | * The window in time where both valves are completely closed begins on the compression stroke, with the closing of the intake valve. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1717577)) | + | * The window in time where both valves are completely closed begins on the compression stroke, with the closing of the intake valve. ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/160094-compression-tdc-please-help-me-find-it?t=1717577)) |
| * Both valves stay closed through the rest of the compression stroke, and then most of the following power stroke, at which point the exhaust valve opens. | * Both valves stay closed through the rest of the compression stroke, and then most of the following power stroke, at which point the exhaust valve opens. | ||
| * Compression TDC sits just about half way in between those two events, so it makes a good reference point. | * Compression TDC sits just about half way in between those two events, so it makes a good reference point. | ||
| Line 27: | Line 27: | ||
| There are several ways to go about it depending on reason for needing to find TDC, available tools, if and how far the engine is disassembled, etc. \\ | There are several ways to go about it depending on reason for needing to find TDC, available tools, if and how far the engine is disassembled, etc. \\ | ||
| - | [[techtalk:ref:trouble05#find_tdc_compression_using_the_rocker_arms_as_a_visual|Find TDC (compression) Using the Rocker Arms as a Visual]] \\ | + | [[techtalk:ref:svcproc22#find_tdc_compression_using_the_rocker_arms_as_a_visual|Find TDC (compression) Using the Rocker Arms as a Visual]] \\ |
| - | [[techtalk:ref:trouble05#find_tdc_compression_using_the_timing_mark_on_the_flywheel_57-03|Find TDC (compression) Using the Timing Mark on the Flywheel (57-03)]] \\ | + | [[techtalk:ref:svcproc22#find_tdc_compression_using_the_timing_mark_on_the_flywheel_57-03|Find TDC (compression) Using the Timing Mark on the Flywheel (57-03)]] \\ |
| - | [[techtalk:ref:trouble05#find_tdc_compression_with_the_rocker_box_off_-_cams_in|Find TDC (compression) with the Rocker Box Off - Cams In]] \\ | + | [[techtalk:ref:svcproc22#find_tdc_compression_with_the_rocker_box_off_-_cams_in|Find TDC (compression) with the Rocker Box Off - Cams In]] \\ |
| - | [[techtalk:ref:trouble05#confirming_which_tdc_you_re_on_using_the_timing_rotor_cup|Confirming Which TDC Your On Using the Timing (rotor) Cup]] \\ | + | [[techtalk:ref:svcproc22#confirming_which_tdc_you_re_on_using_the_timing_rotor_cup|Confirming Which TDC Your On Using the Timing (rotor) Cup]] \\ |
| ==== Verifying Compression By Way of the Spark Plug Hole ==== | ==== Verifying Compression By Way of the Spark Plug Hole ==== | ||
| - | Using the [[techtalk:ref:trouble05#find_compression_using_the_finger_method|The Finger Method]] \\ | + | Using the [[techtalk:ref:svcproc22#find_compression_using_the_finger_method|The Finger Method]] \\ |
| A common practice for knowing when the piston is coming up on the compression stroke. \\ | A common practice for knowing when the piston is coming up on the compression stroke. \\ | ||
| Basically you put your finger over the spark plug hole and wait for the piston to push air past your finger. \\ | Basically you put your finger over the spark plug hole and wait for the piston to push air past your finger. \\ | ||
| - | Using a [[techtalk:ref:trouble05#find_compression_using_a_tdc_whistle|TDC Whistle]] \\ | + | Using a [[techtalk:ref:svcproc22#find_compression_using_a_tdc_whistle|TDC Whistle]] \\ |
| This works on the same principle as using your finger. \\ | This works on the same principle as using your finger. \\ | ||
| The whistle will begin blowing as compression builds in the cylinder. \\ | The whistle will begin blowing as compression builds in the cylinder. \\ | ||
| + | |||
| ==== TDC: Compression Stroke vs Exhaust Stroke of the Piston ==== | ==== TDC: Compression Stroke vs Exhaust Stroke of the Piston ==== | ||
| In terms of the piston position, there's no difference between compression TDC and overlap TDC. \\ | In terms of the piston position, there's no difference between compression TDC and overlap TDC. \\ | ||
| The piston doesn't do anything different. \\ | The piston doesn't do anything different. \\ | ||
| - | Compression TDC and exhaust (overlap) TDC are only different by virtue of what the valvetrain is doing. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1717577)) | + | Compression TDC and exhaust (overlap) TDC are only different by virtue of what the valvetrain is doing. ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/160094-compression-tdc-please-help-me-find-it?t=1717577)) |
| - | * **With the piston on TDC of the compression stroke**: (otherwise referred to as "TDC Compression") ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1717577)) | + | * **With the piston on TDC of the compression stroke**: (otherwise referred to as "TDC Compression") ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/160094-compression-tdc-please-help-me-find-it?t=1717577)) |
| * Both valves are closed. | * Both valves are closed. | ||
| * Both corresponding cams are on their base circle. | * Both corresponding cams are on their base circle. | ||
| * The cams and lifters are producing the least amount of pressure upward toward the rockers and valves. | * The cams and lifters are producing the least amount of pressure upward toward the rockers and valves. | ||
| * When the lifters bleed off their oil, there will little to no pressure toward the rockers and valves. | * When the lifters bleed off their oil, there will little to no pressure toward the rockers and valves. | ||
| - | * **With the piston on TDC of the exhaust stroke**: (otherwise referred to as "TDC Overlap") ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1717577)) | + | * **With the piston on TDC of the exhaust stroke**: (otherwise referred to as "TDC Overlap") ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/160094-compression-tdc-please-help-me-find-it?t=1717577)) |
| * Both valves are slightly open. | * Both valves are slightly open. | ||
| * Both corresponding cams are on their respective side ramps. | * Both corresponding cams are on their respective side ramps. | ||
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| ====== Finding True TDC ====== | ====== Finding True TDC ====== | ||
| - | + | \\ | |
| - | + | ||
| ===== Accuracy of True TDC Using Only A Dial Indicator ===== | ===== Accuracy of True TDC Using Only A Dial Indicator ===== | ||
| There are several ways to find TDC. \\ | There are several ways to find TDC. \\ | ||
| Finding True TDC is a little more tedious. \\ | Finding True TDC is a little more tedious. \\ | ||
| - | By using only a dial indicator on top of the piston, the point where the indicator falls off it's high point will be different. \\ (depending on which direction you rotate the engine to find the high point). ((rivethog of the XLFORUM http://xlforum.net/forums/showthread.php?t=1507847)). \\ | + | By using only a dial indicator on top of the piston, the point where the indicator falls off it's high point will be different. \\ (depending on which direction you rotate the engine to find the high point). ((rivethog of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/138903-ccing-my-combustion-chambers?t=1507847)). \\ |
| There will be a few degrees of interpretation before the piston rolls back down. \\ | There will be a few degrees of interpretation before the piston rolls back down. \\ | ||
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| So, both ways are more user judgmental than anything scientific. | So, both ways are more user judgmental than anything scientific. | ||
| - | |{{:techtalk:ref:engmech:checking_engine_ccs_with_the_head_on_by_1_billeuze.jpg?direct&300|}}|{{:techtalk:ref:trouble:dial_indicator_for_tdc_by_grind_.jpg?direct&400|}}| | + | |{{:techtalk:ref:engmech:checking_engine_ccs_with_the_head_on_by_1_billeuze.jpg?direct&300|}}|{{techtalk:ref:svcproc:dial_indicator_for_tdc_by_grind_.jpg?direct&400|}}| |
| - | |For Ironhead and Shovelhead cylinders, \\ pull the head and install the indicator. ((photo by billeuze of the XLFORUM http://xlforum.net/forums/showthread.php?t=1507847))|Evo cylinders will have to be restrained with the \\ PVC couplings or other means. ((photo by by ~Grind~ of the XLFORUM http://xlforum.net/forums/showthread.php?t=1448694))| | + | |For Ironhead and Shovelhead cylinders, \\ pull the head and install the indicator. ((photo by billeuze of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/138903-ccing-my-combustion-chambers?t=1507847))|Evo cylinders will have to be restrained with the \\ PVC couplings or other means. ((photo by by ~Grind~ of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/134422-~grinds~-hammer-performance-1250-build?t=1448694))| |
| ===== Find True TDC Using a Dial Indicator and a Degree Wheel ===== | ===== Find True TDC Using a Dial Indicator and a Degree Wheel ===== | ||
| The dial indicator and the degree wheel are used in unison. \\ | The dial indicator and the degree wheel are used in unison. \\ | ||
| Line 78: | Line 78: | ||
| The degree wheel will reflect the degree on each side of the highest point. \\ | The degree wheel will reflect the degree on each side of the highest point. \\ | ||
| Then you calculate the middle of these two points to reach True TDC. | Then you calculate the middle of these two points to reach True TDC. | ||
| - | |||
| - **Remove both spark plugs**: (or one on each cylinder for dual plug heads). | - **Remove both spark plugs**: (or one on each cylinder for dual plug heads). | ||
| Line 101: | Line 100: | ||
| * Turn the engine backwards however many degrees of the resulting number to True TDC. \\ (it's best to count the degree marks first, then double check your counting and then make a mark on the wheel before trying to count them as you turn the wheel) | * Turn the engine backwards however many degrees of the resulting number to True TDC. \\ (it's best to count the degree marks first, then double check your counting and then make a mark on the wheel before trying to count them as you turn the wheel) | ||
| * Re-set the degree wheel to "0" at the pointer without moving the engine. | * Re-set the degree wheel to "0" at the pointer without moving the engine. | ||
| - | |||
| ===== Find True TDC Using a Piston Stop and a Degree Wheel ===== | ===== Find True TDC Using a Piston Stop and a Degree Wheel ===== | ||
| Line 121: | Line 119: | ||
| * Rotate the engine so the piston is well below the top of the cylinder. | * Rotate the engine so the piston is well below the top of the cylinder. | ||
| * Screw a piston stop tool in the spark plug hole. | * Screw a piston stop tool in the spark plug hole. | ||
| - | * Screw the middle bolt of the tool down just past where you think the piston will be when it's at the top of the cylinder. \\ {{:techtalk:ref:tools:piston_stop_by_jorgen.jpg?direct&300|}} ((photo by Jorgen of the XLFORUM http://xlforum.net/forums/showthread.php?t=761410&highlight=degreeing+cams&page=4)) \\ | + | * Screw the middle bolt of the tool down just past where you think the piston will be when it's at the top of the cylinder. \\ {{:techtalk:ref:tools:piston_stop_by_jorgen.jpg?direct&300|}} ((photo by Jorgen of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/92792-cam-choices/page4?t=761410&highlight=degreeing+cams&page=4)) \\ |
| * __With the head off__: | * __With the head off__: | ||
| * You can make a piston stop with a thick plate or metal strap bolted across the open end of the cylinder using 2 opposite head bolt holes. | * You can make a piston stop with a thick plate or metal strap bolted across the open end of the cylinder using 2 opposite head bolt holes. | ||
| Line 129: | Line 127: | ||
| * With the head off, the rings will grab the cylinder and pull it up and out of the case with the piston. | * With the head off, the rings will grab the cylinder and pull it up and out of the case with the piston. | ||
| * The 2 long head bolts would need to be installed in the remaining 2 head bolt holes with a PVC fitting as a sleeve or other to hold the cylinder in place. | * The 2 long head bolts would need to be installed in the remaining 2 head bolt holes with a PVC fitting as a sleeve or other to hold the cylinder in place. | ||
| - | * If using domed pistons, the middle bolt may not be necessary in the plate / strap if the dome extends past the top of the cylinder deck. ((piniongear of the XLFORUM http://xlforum.net/forums/showthread.php?t=800793&page=2)) | + | * If using domed pistons, the middle bolt may not be necessary in the plate / strap if the dome extends past the top of the cylinder deck. ((piniongear of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/95735-tdc-question-for-cams-and-ignition/page2?t=800793&page=2)) |
| * The dome will stop the piston when it touches the plate. | * The dome will stop the piston when it touches the plate. | ||
| - **Find the pre-TDC hash mark on the degree wheel**: | - **Find the pre-TDC hash mark on the degree wheel**: | ||
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| - **Re-set the degree wheel** to "0" at the pointer without moving the engine. | - **Re-set the degree wheel** to "0" at the pointer without moving the engine. | ||
| - | {{:techtalk:ref:tools:degree_wheel_by_jorgen.jpg?direct&300|}} ((photo by Jorgen of the XLFORUM http://xlforum.net/forums/showthread.php?t=761410&highlight=degreeing+cams&page=4)) \\ | + | {{:techtalk:ref:tools:degree_wheel_by_jorgen.jpg?direct&300|}} ((photo by Jorgen of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/92792-cam-choices/page4?t=761410&highlight=degreeing+cams&page=4)) \\ |
| ====== Finding / Verifying TDC on Compression Stroke ====== | ====== Finding / Verifying TDC on Compression Stroke ====== | ||
| ===== Find TDC (compression) Using the Rocker Arms as a Visual ===== | ===== Find TDC (compression) Using the Rocker Arms as a Visual ===== | ||
| - | You can tell the [[techtalk:ref:trouble05#tdccompression_stroke_vs_exhaust_stroke_of_the_piston|difference between TDC compression and TDC exhaust strokes]] while watching the rocker arms. \\ | + | You can tell the [[techtalk:ref:svcproc22#tdccompression_stroke_vs_exhaust_stroke_of_the_piston|difference between TDC compression and TDC exhaust strokes]] while watching the rocker arms. \\ |
| However, you must look at the valve train __movement__ to be able to tell the difference. \\ | However, you must look at the valve train __movement__ to be able to tell the difference. \\ | ||
| - | And just as importantly, you have to look at what the valvetrain is doing before you arrive at TDC. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1717577)) | + | And just as importantly, you have to look at what the valvetrain is doing before you arrive at TDC. ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/160094-compression-tdc-please-help-me-find-it?t=1717577)) |
| * There are (almost) no visible differences in the position of the valvetrain when you're at compression TDC as opposed to overlap TDC. | * There are (almost) no visible differences in the position of the valvetrain when you're at compression TDC as opposed to overlap TDC. | ||
| Line 160: | Line 159: | ||
| * On the exhaust stroke pass through TDC, both valves are slightly open and both their corresponding rocker arms are slightly raised). | * On the exhaust stroke pass through TDC, both valves are slightly open and both their corresponding rocker arms are slightly raised). | ||
| - | * Just by looking at the rockers sitting still with the piston at TDC, it's hard to tell if they are both down or both slightly raised. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1717577)) | + | * Just by looking at the rockers sitting still with the piston at TDC, it's hard to tell if they are both down or both slightly raised. ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/160094-compression-tdc-please-help-me-find-it?t=1717577)) |
| * It's an easy mistake to make and a very unreliable way to tell the TDC's apart. | * It's an easy mistake to make and a very unreliable way to tell the TDC's apart. | ||
| * It's also been the cause incorrect pushrod adjustments. | * It's also been the cause incorrect pushrod adjustments. | ||
| Line 175: | Line 174: | ||
| * This will most likely shake the bike some so you'll have to watch the rockers carefully. | * This will most likely shake the bike some so you'll have to watch the rockers carefully. | ||
| * With the transmission in neutral, rotate the crank shaft or pinion shaft with a wrench. \\ (no compression to put undue stress on the pinion shaft) | * With the transmission in neutral, rotate the crank shaft or pinion shaft with a wrench. \\ (no compression to put undue stress on the pinion shaft) | ||
| - | - **Rotate the engine through the intake cycle**: ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1717577)) | + | - **Rotate the engine through the intake cycle**: ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/160094-compression-tdc-please-help-me-find-it?t=1717577)) |
| * Watch the pushrod end of the intake rocker arm as you're rotating the engine forward. | * Watch the pushrod end of the intake rocker arm as you're rotating the engine forward. | ||
| * You'll see the intake rocker move up and open the valve. | * You'll see the intake rocker move up and open the valve. | ||
| * Then you'll see the rocker lower and close the intake valve. | * Then you'll see the rocker lower and close the intake valve. | ||
| * Now stop. | * Now stop. | ||
| - | - **Anticipate to stop at the nearest TDC from here while rotating the engine forward**: ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1717577)) | + | - **Anticipate to stop at the nearest TDC from here while rotating the engine forward**: ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/160094-compression-tdc-please-help-me-find-it?t=1717577)) |
| - | * This will be your ending point of rotation at [[techtalk:ref:trouble05#tdc_on_the_compression_stroke|TDC (compression)]]. | + | * This will be your ending point of rotation at [[techtalk:ref:svcproc22#tdc_on_the_compression_stroke|TDC (compression)]]. |
| - | * You can [[techtalk:ref:trouble05#find_tdc_using_a_straw|insert a drinking straw into the spark plug hole]] as a 'feeler' and watch for it to rise to the top. | + | * You can [[techtalk:ref:svcproc22#find_tdc_using_a_straw|insert a drinking straw into the spark plug hole]] as a 'feeler' and watch for it to rise to the top. |
| * When you see it peak and start going back down, back up a little to where it sits steady and right at TDC. | * When you see it peak and start going back down, back up a little to where it sits steady and right at TDC. | ||
| * You can also have a helper watch for the TDC line to appear in the center of the timing hole with the plug removed (if applicable). | * You can also have a helper watch for the TDC line to appear in the center of the timing hole with the plug removed (if applicable). | ||
| Line 191: | Line 190: | ||
| * Spinning the wheel by yourself, although do-able, can distract your focus on the rockers plus the bike shakes quite a bit making it hard to see movement. | * Spinning the wheel by yourself, although do-able, can distract your focus on the rockers plus the bike shakes quite a bit making it hard to see movement. | ||
| * If you can't see the rockers move while you're turning the rear wheel, you can have a helper turn the wheel. | * If you can't see the rockers move while you're turning the rear wheel, you can have a helper turn the wheel. | ||
| - | * If your arm-span will permit, it is possible to put a flat-bladed screwdriver through the timing hole with one hand (flat and lightly against the flywheel), \\ rotate the rear wheel with the other and you can feel and catch the single line mark as it passes the timing hole as you are watching the rockers. ((Mosey of the XLFORUM http://xlforum.net/forums/showthread.php?t=1644797)) | + | * If your arm-span will permit, it is possible to put a flat-bladed screwdriver through the timing hole with one hand (flat and lightly against the flywheel), \\ rotate the rear wheel with the other and you can feel and catch the single line mark as it passes the timing hole as you are watching the rockers. ((Mosey of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-general-discussion-and-problems/152679-finding-tdc?t=1644797)) |
| * If you can't physically see the rockers moving, you can put a finger tip on the end of each rocker pair and feel them move. | * If you can't physically see the rockers moving, you can put a finger tip on the end of each rocker pair and feel them move. | ||
| - | * When you are at TDC (compression) and rotate the engine forward from there, the exhaust valve (and rocker) are the first to move. Then the intake. ((Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2069380&highlight=tdc&page=2)) | + | * When you are at TDC (compression) and rotate the engine forward from there, the exhaust valve (and rocker) are the first to move. Then the intake. ((Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-motor-top-end/193368-how-can-you-tell-if-rocker-gasket-was-not-installed-correctly-tdc/page2?t=2069380&highlight=tdc&page=2)) |
| ==== Another Visual ==== | ==== Another Visual ==== | ||
| - | |||
| - Rotate the engine to stop on (any) TDC. | - Rotate the engine to stop on (any) TDC. | ||
| * Then turn the engine (slowly) back and forth a 1/4 turn or so passing thru that TDC on both sides. | * Then turn the engine (slowly) back and forth a 1/4 turn or so passing thru that TDC on both sides. | ||
| Line 213: | Line 210: | ||
| * 1957-2003 stock flywheels have TDC marks and advanced timing marks for timing the ignition. | * 1957-2003 stock flywheels have TDC marks and advanced timing marks for timing the ignition. | ||
| * You can use the TDC mark etched into your flywheel on 2003 and prior stock engines to find TDC. | * You can use the TDC mark etched into your flywheel on 2003 and prior stock engines to find TDC. | ||
| - | * The marks should be accurate enough on these engines although [[techtalk:ref:trouble05#finding_true_tdc|True TDC]] can be checked if need be. | + | * The marks should be accurate enough on these engines although [[techtalk:ref:svcproc22#finding_true_tdc|True TDC]] can be checked if need be. |
| - | * [[techtalk:ih:engctl01f|Click here for stock 57-85 TDC symbol identification]]. | + | * [[techtalk:ih:engctl01#timing_marks|Click here for stock 57-85 TDC symbol identification]]. |
| * [[techtalk:evo:engctl01#ignition_timing_-_all_models_thru_2003|Click here for stock 86-03 TDC symbol identification]]. | * [[techtalk:evo:engctl01#ignition_timing_-_all_models_thru_2003|Click here for stock 86-03 TDC symbol identification]]. | ||
| - | * If you've upgraded to a 2004 or later flywheel assembly, (on 03 and prior engines) you'll have to [[techtalk:ref:engmech01c|make your own TDC mark]] on these if you need one. \\ (this procedure can also be used to create the advance timing mark) | + | * If you've upgraded to a 2004 or later flywheel assembly, (on 03 and prior engines) you'll have to [[techtalk:ref:engmech01l|make your own TDC mark]] on these if you need one. \\ (this procedure can also be used to create the advance timing mark) |
| Line 228: | Line 225: | ||
| * One turning the rear tire and one watching the timing mark in the inspection hole. | * One turning the rear tire and one watching the timing mark in the inspection hole. | ||
| * However, it can be done with one person; | * However, it can be done with one person; | ||
| - | * Rotate the rear wheel slightly, [[techtalk:ref:trouble05#find_tdc_using_a_straw|check piston position using a straw]] and repeat until the piston is close to TDC. | + | * Rotate the rear wheel slightly, [[techtalk:ref:svcproc22#find_tdc_using_a_straw|check piston position using a straw]] and repeat until the piston is close to TDC. |
| * Then nudge the rear wheel forward until the TDC mark appears in the timing hole. | * Then nudge the rear wheel forward until the TDC mark appears in the timing hole. | ||
| * With the transmission in neutral, rotate the crank shaft or pinion shaft with a wrench. \\ (no compression to put undue stress on the pinion shaft) | * With the transmission in neutral, rotate the crank shaft or pinion shaft with a wrench. \\ (no compression to put undue stress on the pinion shaft) | ||
| Line 237: | Line 234: | ||
| - **Listen or feel for compression building in the cylinder as the piston rises** | - **Listen or feel for compression building in the cylinder as the piston rises** | ||
| * Verify when the cylinder is on the compression stroke while rotating the engine by use of an indicator in the spark plug hole. \\ (forced air past the indicator shows compression is building in the cylinder): | * Verify when the cylinder is on the compression stroke while rotating the engine by use of an indicator in the spark plug hole. \\ (forced air past the indicator shows compression is building in the cylinder): | ||
| - | * You can use [[techtalk:ref:trouble05#find_compression_using_the_finger_method|the finger method]] below to feel when the cylinder is pushing out forced air. | + | * You can use [[techtalk:ref:svcproc22#find_compression_using_the_finger_method|the finger method]] below to feel when the cylinder is pushing out forced air. |
| - | * You can also use a [[techtalk:ref:trouble05#find_compression_using_a_tdc_whistle|TDC whistle]] with the same principle. | + | * You can also use a [[techtalk:ref:svcproc22#find_compression_using_a_tdc_whistle|TDC whistle]] with the same principle. |
| - | * The window in time where both valves are completely closed begins on the compression stroke, with the closing of the intake valve. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1717577)) | + | * The window in time where both valves are completely closed begins on the compression stroke, with the closing of the intake valve. ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/160094-compression-tdc-please-help-me-find-it?t=1717577)) |
| * Both valves stay closed through the rest of the compression stroke, and then most of the following power stroke, at which point the exhaust valve opens. | * Both valves stay closed through the rest of the compression stroke, and then most of the following power stroke, at which point the exhaust valve opens. | ||
| * Compression TDC sits just about half way in between those two events. | * Compression TDC sits just about half way in between those two events. | ||
| Line 245: | Line 242: | ||
| - **Anticipate to rotate the engine forward to the nearest TDC mark from here**: | - **Anticipate to rotate the engine forward to the nearest TDC mark from here**: | ||
| * Slowly rotate the engine until the TDC mark is in center of the timing hole. | * Slowly rotate the engine until the TDC mark is in center of the timing hole. | ||
| - | * This will be your ending point of rotation at [[techtalk:ref:trouble05#tdc_on_the_compression_stroke|TDC (compression)]]. | + | * This will be your ending point of rotation at [[techtalk:ref:svcproc22#tdc_on_the_compression_stroke|TDC (compression)]]. |
| - | | This can be removed with a 3/8" Allen hex wrench ((photos by Phillober of the XLFORUM http://xlforum.net/forums/showthread.php?t=1175659&highlight=tapping+threads&page=3)) || | + | | This can be removed with a 3/8" Allen hex wrench ((photos by Phillober of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-electrical/sportster-motorcycle-electrical-and-ignition/120488-phillober-s-illustrated-ignition-thread-pic-heavy/page3?t=1175659&highlight=tapping+threads&page=3)) || |
| - | |{{:techtalk:ref:trouble:finding_tdc_compression_1_by_phillober.jpg?direct&300|}}|{{:techtalk:ref:trouble:finding_tdc_compression_2_by_phillober.jpg?direct&300|}}| | + | |{{techtalk:ref:svcproc:finding_tdc_compression_1_by_phillober.jpg?direct&300|}}|{{techtalk:ref:svcproc:finding_tdc_compression_2_by_phillober.jpg?direct&300|}}| |
| * Once torque is removed (broken free) while backing out the timing plug, you should be able to turn it out by hand or by using just the Allen wrench socket gently by hand. \\ If you can't turn it out by hand, the threads could be warped or damaged from over torque the last time it was installed. \\ [[techtalk:ref:engmech01a|You can read more about it here]] including repair of damaged threads. | * Once torque is removed (broken free) while backing out the timing plug, you should be able to turn it out by hand or by using just the Allen wrench socket gently by hand. \\ If you can't turn it out by hand, the threads could be warped or damaged from over torque the last time it was installed. \\ [[techtalk:ref:engmech01a|You can read more about it here]] including repair of damaged threads. | ||
| * While installing the plug, set it in the hole and turn it backwards until you feel thread engagement before attempting to use any force to turn it into the hole. \\ You should be able to install it by hand as mentioned above to snug. Do not over-torque. \\ See also [[techtalk:ref:engmech01a#installing_the_plug|Installing the plug]]. | * While installing the plug, set it in the hole and turn it backwards until you feel thread engagement before attempting to use any force to turn it into the hole. \\ You should be able to install it by hand as mentioned above to snug. Do not over-torque. \\ See also [[techtalk:ref:engmech01a#installing_the_plug|Installing the plug]]. | ||
| - | | When you take out the timing plug, \\ this is more than likely what you see ((photo by Phillober of the XLFORUM http://xlforum.net/forums/showthread.php?t=1175659&highlight=tapping+threads&page=3)) | TDC timing mark in center of window ((photo by Phillober of the XLFORUM http://xlforum.net/forums/showthread.php?t=1175659&highlight=tapping+threads&page=3)) | | + | | When you take out the timing plug, \\ this is more than likely what you see ((photo by Phillober of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-electrical/sportster-motorcycle-electrical-and-ignition/120488-phillober-s-illustrated-ignition-thread-pic-heavy/page3?t=1175659&highlight=tapping+threads&page=3)) | TDC timing mark in center of window ((photo by Phillober of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-electrical/sportster-motorcycle-electrical-and-ignition/120488-phillober-s-illustrated-ignition-thread-pic-heavy/page3?t=1175659&highlight=tapping+threads&page=3)) | |
| - | |{{:techtalk:ref:trouble:finding_tdc_compression_6_by_phillober.jpg?direct&300|}}|{{:techtalk:ref:trouble:finding_tdc_compression_7_by_phillober.jpg?direct&300|}}| | + | |{{techtalk:ref:svcproc:finding_tdc_compression_6_by_phillober.jpg?direct&300|}}|{{techtalk:ref:svcproc:finding_tdc_compression_7_by_phillober.jpg?direct&300|}}| |
| ===== Find TDC (compression) with the Rocker Box Off - Cams In ===== | ===== Find TDC (compression) with the Rocker Box Off - Cams In ===== | ||
| - | + | Without the valves going up and down, the cylinder will simply push out air on both [[techtalk:ref:svcproc22#tdccompression_stroke_vs_exhaust_stroke_of_the_piston|the compression and the exhaust strokes]]. ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-motor-top-end/151648-simple-question-about-tdc-and-push-rods?t=1637369)) \\ | |
| - | Without the valves going up and down, the cylinder will simply push out air on both [[techtalk:ref:trouble05#tdccompression_stroke_vs_exhaust_stroke_of_the_piston|the compression and the exhaust strokes]]. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1637369)) \\ | + | |
| It's the action of the valves that reduces that to just the compression stroke. \\ | It's the action of the valves that reduces that to just the compression stroke. \\ | ||
| Line 284: | Line 280: | ||
| - **Proceed from there to TDC and you're in the right place**. | - **Proceed from there to TDC and you're in the right place**. | ||
| * Continue rotating the engine forward until the TDC mark appears in the timing hole window (if applicable). | * Continue rotating the engine forward until the TDC mark appears in the timing hole window (if applicable). | ||
| - | * This will be your ending point at [[techtalk:ref:trouble05#tdc_on_the_compression_stroke|TDC (compression)]]. | + | * This will be your ending point at [[techtalk:ref:svcproc22#tdc_on_the_compression_stroke|TDC (compression)]]. |
| - | * You can also [[techtalk:ref:trouble05#find_tdc_using_a_straw|use a straw in the spark plug hole]] to verify when the piston reaches the top. | + | * You can also [[techtalk:ref:svcproc22#find_tdc_using_a_straw|use a straw in the spark plug hole]] to verify when the piston reaches the top. |
| ===== Find TDC Using a Straw ===== | ===== Find TDC Using a Straw ===== | ||
| This is an easy way to measure when the piston is in the TDC area. \\ | This is an easy way to measure when the piston is in the TDC area. \\ | ||
| - | However, it will not tell you if your on [[techtalk:ref:trouble05#tdccompression_stroke_vs_exhaust_stroke_of_the_piston|compression or exhaust (overlap) stroke]], \\ | + | However, it will not tell you if your on [[techtalk:ref:svcproc22#tdccompression_stroke_vs_exhaust_stroke_of_the_piston|compression or exhaust (overlap) stroke]], \\ |
| - | And, it's not an indicator of [[techtalk:ref:trouble05#finding_tdc_of_the_piston|true TDC]]. \\ | + | And, it's not an indicator of [[techtalk:ref:svcproc22#finding_tdc_of_the_piston|true TDC]]. \\ |
| * This can be done with the rocker box on or off. | * This can be done with the rocker box on or off. | ||
| Line 319: | Line 315: | ||
| * For more assurance, you can roll the engine backwards and forwards from here to verify the piston rise and fall on each side of the dwell. | * For more assurance, you can roll the engine backwards and forwards from here to verify the piston rise and fall on each side of the dwell. | ||
| * Pick a spot in the middle of this range and you're done. | * Pick a spot in the middle of this range and you're done. | ||
| - | |||
| - | |||
| - | |||
| |Straw in plug hole for single or dual plug heads ((photo by Hippysmack))|Alternative location with dual plug heads \\ (better location, less binding of the straw). ((photo by Hippysmack))| | |Straw in plug hole for single or dual plug heads ((photo by Hippysmack))|Alternative location with dual plug heads \\ (better location, less binding of the straw). ((photo by Hippysmack))| | ||
| Line 329: | Line 322: | ||
| Basically, you just plug the hole with their finger and wait for pressure to blow past it. \\ | Basically, you just plug the hole with their finger and wait for pressure to blow past it. \\ | ||
| There is a distinct difference you can feel between the 2 TDCs from your finger. \\ | There is a distinct difference you can feel between the 2 TDCs from your finger. \\ | ||
| - | The only drawback using this method is that it only works when disassembling. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=2069380&highlight=rocker+box&page=2)) \\ | + | The only drawback using this method is that it only works when disassembling. ((aswracing of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-motor-top-end/193368-how-can-you-tell-if-rocker-gasket-was-not-installed-correctly-tdc/page2?t=2069380&highlight=rocker+box&page=2)) \\ |
| + | (or rather only works if the pushrods are installed) \\ | ||
| It doesn't work when assembling. \\ | It doesn't work when assembling. \\ | ||
| Every up stroke has compression when assembling and the valvetrain isn't hooked up and working. | Every up stroke has compression when assembling and the valvetrain isn't hooked up and working. | ||
| Line 349: | Line 343: | ||
| * One turning the rear tire and one holding a finger over the spark plug hole. | * One turning the rear tire and one holding a finger over the spark plug hole. | ||
| * However, it can be done with one person; | * However, it can be done with one person; | ||
| - | * Rotate the rear wheel slowly while spot checking the piston position with a [[techtalk:ref:trouble05#find_tdc_using_a_straw|straw in the spark plug hole]]. | + | * Rotate the rear wheel slowly while spot checking the piston position with a [[techtalk:ref:svcproc22#find_tdc_using_a_straw|straw in the spark plug hole]]. |
| * When the piston starts rising, place a finger over the plug hole with one hand and bump the rear wheel forward with the other using a wide wingspan. | * When the piston starts rising, place a finger over the plug hole with one hand and bump the rear wheel forward with the other using a wide wingspan. | ||
| * With the transmission in neutral, rotate the crank shaft or pinion shaft with a wrench. \\ (no compression to put undue stress on the pinion shaft) | * With the transmission in neutral, rotate the crank shaft or pinion shaft with a wrench. \\ (no compression to put undue stress on the pinion shaft) | ||
| Line 356: | Line 350: | ||
| * You'll here the compression building the more you rotate the engine. | * You'll here the compression building the more you rotate the engine. | ||
| * Once the pressure blows past your finger, the piston has risen toward to the top of the bore on the compression stroke. | * Once the pressure blows past your finger, the piston has risen toward to the top of the bore on the compression stroke. | ||
| - | * Press as hard as you want on the hole, the pressure will be stronger than you as it builds. ((Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2069380&highlight=tdc&page=2)) | + | * Press as hard as you want on the hole, the pressure will be stronger than you as it builds. ((Hippysmack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-motor-top-end/193368-how-can-you-tell-if-rocker-gasket-was-not-installed-correctly-tdc/page2?t=2069380&highlight=tdc&page=2)) |
| * You may need to roll the engine over several times until you have a good feel of air being forced out of the hole. | * You may need to roll the engine over several times until you have a good feel of air being forced out of the hole. | ||
| * Be careful not to rotate the engine past this TDC. | * Be careful not to rotate the engine past this TDC. | ||
| Line 364: | Line 358: | ||
| - **Anticipate to rotate the engine forward to the nearest TDC mark from here**: | - **Anticipate to rotate the engine forward to the nearest TDC mark from here**: | ||
| * Slowly rotate the engine until the TDC mark is in center of the timing hole. | * Slowly rotate the engine until the TDC mark is in center of the timing hole. | ||
| - | * This will be your ending point of rotation at [[techtalk:ref:trouble05#tdc_on_the_compression_stroke|TDC (compression)]]. | + | * This will be your ending point of rotation at [[techtalk:ref:svcproc22#tdc_on_the_compression_stroke|TDC (compression)]]. |
| - | + | ||
| - | + | ||
| - | | Using the "finger method" to feel compression build ((photo by Phillober of the XLFORUM http://xlforum.net/forums/showthread.php?t=1175659&highlight=tapping+threads&page=3)) | | + | |
| - | |{{:techtalk:ref:trouble:finding_tdc_compression_8_by_phillober.jpg?direct&300|}}| | + | |
| + | | Using the "finger method" to feel compression build ((photo by Phillober of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-electrical/sportster-motorcycle-electrical-and-ignition/120488-phillober-s-illustrated-ignition-thread-pic-heavy/page3?t=1175659&highlight=tapping+threads&page=3)) | | ||
| + | |{{techtalk:ref:svcproc:finding_tdc_compression_8_by_phillober.jpg?direct&300|}}| | ||
| ===== Find Compression Using a TDC Whistle ===== | ===== Find Compression Using a TDC Whistle ===== | ||
| Line 402: | Line 394: | ||
| * If your not sure if the tone you hear is the correct tone, continue rotating the engine until you get a feel for it. | * If your not sure if the tone you hear is the correct tone, continue rotating the engine until you get a feel for it. | ||
| - **Anticipate to rotate the engine forward to the nearest TDC from here**: | - **Anticipate to rotate the engine forward to the nearest TDC from here**: | ||
| - | * This will be your ending point of rotation at [[techtalk:ref:trouble05#tdc_on_the_compression_stroke|TDC (compression)]]. | + | * This will be your ending point of rotation at [[techtalk:ref:svcproc22#tdc_on_the_compression_stroke|TDC (compression)]]. |
| * Slowly rotate the engine until the TDC mark is in center of the timing hole. | * Slowly rotate the engine until the TDC mark is in center of the timing hole. | ||
| - | * Or you can [[techtalk:ref:trouble05#find_tdc_using_a_straw|use a straw inserted into the spark plug hole]] to measure when the piston has reached the top. | + | * Or you can [[techtalk:ref:svcproc22#find_tdc_using_a_straw|use a straw inserted into the spark plug hole]] to measure when the piston has reached the top. |
| + | |||
| + | |{{:techtalk:ref:tools:tdc_whistles_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:tools:tdc_whistle_2_by_hippysmack.jpg?direct&300|}}| | ||
| + | | 14 mm and 12 mm TDC whistles ((photo by Hippysmack)) | 12 mm TDC whistle ((photo by Hippysmack)) | | ||
| - | |{{:techtalk:ref:tools:tdc_whistles_by_hippysmack.jpg?direct&300|}}| | ||
| - | | TDC whistles ((photo by Hippysmack)) | | ||
| ===== Confirming Which TDC You're On Using the Timing (rotor) Cup ===== | ===== Confirming Which TDC You're On Using the Timing (rotor) Cup ===== | ||
| - | It is possible to confirm whether the piston is on [[techtalk:ref:trouble05#tdccompression_stroke_vs_exhaust_stroke_of_the_piston|compression or exhaust stroke]] by removing the nosecone cover and ignition and verifying which position the notch in the timing rotor is pointing. \\ | + | It is possible to confirm whether the piston is on [[techtalk:ref:svcproc22#tdccompression_stroke_vs_exhaust_stroke_of_the_piston|compression or exhaust stroke]] by removing the nosecone cover and ignition and verifying which position the notch in the timing rotor is pointing. \\ |
| The rotor is attached to #2 cam and rotates with it. \\ | The rotor is attached to #2 cam and rotates with it. \\ | ||
| Line 415: | Line 408: | ||
| Therefore, the cams turn 1/2 the times of the crank. \\ | Therefore, the cams turn 1/2 the times of the crank. \\ | ||
| - | The rotor cup needs 720° rotation of the crankshaft to a complete 1 revolution. ((conv90 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1924672&page=2)) | + | The rotor cup needs 720° rotation of the crankshaft to a complete 1 revolution. ((conv90 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/frame-mount-evo-sportster-talk-1986-2003-models/179108-find-tdc-compression-stroke-using/page2?t=1924672&page=2)) |
| \\ | \\ | ||
| 360° + 360° = 720° \\ | 360° + 360° = 720° \\ | ||
| Line 421: | Line 414: | ||
| So, the rotor position on TDC (compression) and TDC on (exhaust) strokes will be different. \\ | So, the rotor position on TDC (compression) and TDC on (exhaust) strokes will be different. \\ | ||
| - | |||
| - | |||
| - **Rotate the crankshaft to position the piston to TDC by which ever method available**: | - **Rotate the crankshaft to position the piston to TDC by which ever method available**: | ||
| Line 429: | Line 420: | ||
| * Find TDC using a dial indicator and a degree wheel. | * Find TDC using a dial indicator and a degree wheel. | ||
| * Use a drinking straw through the spark plug hole and it will stop rising when the piston is at TDC. | * Use a drinking straw through the spark plug hole and it will stop rising when the piston is at TDC. | ||
| - | - **Decide which stroke your at by inspecting the position of the timing rotor cup**: ((conv90 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1924672&page=2)) | + | - **Decide which stroke your at by inspecting the position of the timing rotor cup**: ((conv90 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/frame-mount-evo-sportster-talk-1986-2003-models/179108-find-tdc-compression-stroke-using/page2?t=1924672&page=2)) |
| - | * Let's say the first rotation stopped with the TDC mark in the observation hole at [[techtalk:ref:trouble05#tdc_on_the_compression_stroke|TDC (compression stroke)]]. | + | * Let's say the first rotation stopped with the TDC mark in the observation hole at [[techtalk:ref:svcproc22#tdc_on_the_compression_stroke|TDC (compression stroke)]]. |
| * When looking at the notch in the center of the rotor, you'll see it is pointing up to the left. | * When looking at the notch in the center of the rotor, you'll see it is pointing up to the left. | ||
| * Now rotate the crank one additional full revolution (360°) back to the TDC mark. | * Now rotate the crank one additional full revolution (360°) back to the TDC mark. | ||
| Line 436: | Line 427: | ||
| * The #2 cam slot is now pointing down to the right. (180° compared to the position when you were at TDC compression). | * The #2 cam slot is now pointing down to the right. (180° compared to the position when you were at TDC compression). | ||
| * To return at TDC compression, rotate the crank another full revolution (360°) back to the next TDC mark on the flywheel. | * To return at TDC compression, rotate the crank another full revolution (360°) back to the next TDC mark on the flywheel. | ||
| - | |||
| Click on a pic to enlarge: | Click on a pic to enlarge: | ||
| Line 444: | Line 434: | ||
| **Front Cylinder**: | **Front Cylinder**: | ||
| | **Cam positions at TDC on compression stroke** ((photo by Hippysmack)) | **Cam positions at TDC on exhaust stroke** ((photo by Hippysmack)) | | | **Cam positions at TDC on compression stroke** ((photo by Hippysmack)) | **Cam positions at TDC on exhaust stroke** ((photo by Hippysmack)) | | ||
| - | |{{:techtalk:ref:trouble:cam_positions_on_tdc_compression_stroke_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:trouble:cam_positions_on_tdc_exhaust_stroke_by_hippysmack.jpg?direct&300|}}| | + | |{{techtalk:ref:svcproc:cam_positions_on_tdc_compression_stroke_by_hippysmack.jpg?direct&300|}}|{{techtalk:ref:svcproc:cam_positions_on_tdc_exhaust_stroke_by_hippysmack.jpg?direct&300|}}| |
| **Rear Cylinder**: | **Rear Cylinder**: | ||
| | **Cam positions at TDC on compression stroke** ((photo by Hippysmack)) | **Cam positions at TDC on exhaust stroke** ((photo by Hippysmack)) | | | **Cam positions at TDC on compression stroke** ((photo by Hippysmack)) | **Cam positions at TDC on exhaust stroke** ((photo by Hippysmack)) | | ||
| - | |{{:techtalk:ref:trouble:degreeing_cams_21_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:trouble:degreeing_cams_22_by_hippysmack.jpg?direct&300|}}| | + | |{{techtalk:ref:svcproc:degreeing_cams_21_by_hippysmack.jpg?direct&300|}}|{{techtalk:ref:svcproc:degreeing_cams_22_by_hippysmack.jpg?direct&300|}}| |
| * **With the gearcase cover on, ignition module removed**: The slot in the timing cup sits inside the slot in the #2 cam so the positioning is the same respectively. | * **With the gearcase cover on, ignition module removed**: The slot in the timing cup sits inside the slot in the #2 cam so the positioning is the same respectively. | ||
| **Front Cylinder**: | **Front Cylinder**: | ||
| - | | **Timing Cup** position at TDC on compression stroke. \\ Slot is up to the left. ((photo by Hippysmack)) | **Timing cup** position at TDC on exhaust stroke. \\ Slot is down to the right. ((photo by Hippysmack)) | | + | | **Timing Cup** position at TDC on compression stroke. \\ Cup mounting notch (near bolt) is up to the left. ((photo by Hippysmack)) | **Timing cup** position at TDC on exhaust stroke. \\ Cup mounting notch (near bolt) is down to the right. ((photo by Hippysmack)) | |
| - | |{{:techtalk:ref:trouble:timing_cup_position_on_tdc_compression_stroke_1_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:trouble:timing_cup_position_on_tdc_exhaust_stroke_1_by_hippysmack.jpg?direct&300|}}| | + | |{{techtalk:ref:svcproc:timing_cup_position_on_tdc_compression_stroke_1_by_hippysmack.jpg?direct&300|}}|{{techtalk:ref:svcproc:timing_cup_position_on_tdc_exhaust_stroke_1_by_hippysmack.jpg?direct&300|}}| |
| ===== Tips for Getting the Transmission in High Gear ===== | ===== Tips for Getting the Transmission in High Gear ===== | ||
| * Try letting the clutch out between gears while rotating the rear wheel. | * Try letting the clutch out between gears while rotating the rear wheel. | ||
| * You can also see if your transmission will upshift without letting the clutch out, | * You can also see if your transmission will upshift without letting the clutch out, | ||
| - | * You can use a Velcro strap as an assist to hold the clutch lever in while turning the rear wheel by hand. ((Shadowdog500 of the XLFORUM http://xlforum.net/forums/showthread.php?t=39764&page=8)) | + | * You can use a Velcro strap as an assist to hold the clutch lever in while turning the rear wheel by hand. ((Shadowdog500 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/24033-setting-the-ignition-timing-on-your-ironhead/page8?t=39764&page=8)) |
| * Remove the strap when your in high gear (4th or 5th respectively). | * Remove the strap when your in high gear (4th or 5th respectively). | ||
| - | * If you don’t have a jack or center-stand handy, you could just push the bike in (high gear) ((Shadowdog500 of the XLFORUM http://xlforum.net/forums/showthread.php?t=39764&page=8)) to set the timing or TDC mark in the hole. | + | * If you don’t have a jack or center-stand handy, you could just push the bike in (high gear) ((Shadowdog500 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/24033-setting-the-ignition-timing-on-your-ironhead/page8?t=39764&page=8)) to set the timing or TDC mark in the hole. |
| * On a 5-speed transmission, there are two separate movements of the shift forks to go from 3rd to fourth. \\ The rear wheel will need to rotate through them to get to 4th. | * On a 5-speed transmission, there are two separate movements of the shift forks to go from 3rd to fourth. \\ The rear wheel will need to rotate through them to get to 4th. | ||
