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techtalk:ih:engctl01 [2019/12/05 04:21] hippysmack [Timing Marks] |
techtalk:ih:engctl01 [2020/05/03 14:17] ixl2relax [Timing Advance] |
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==== Timing Advance ==== | ==== Timing Advance ==== | ||
- | ^ ^Ign. Advance^Ign. Retard ((57-69 HD Sportster FSM pg 3A-11)) ((70-78 HD Sportster FSM pg 3-1)) ((79-85 HD Sportster FSM pg 3-3))^ | + | ^ ^Ign. Retard ((57-69 HD Sportster FSM pg 3A-11)) ((70-78 HD Sportster FSM pg 3-1)) ((79-85 HD Sportster FSM pg 3-3))^Ign. Advance^ |
- | |**57-70**|45° (11/16” BTDC)|15° (5/64") BTDC)| | + | |**57-70**|15° (5/64") BTDC)|45° (11/16” BTDC)| |
- | |**71-72**|40° (17/32” BTDC)|10° (1/32”) BTDC)| | + | |**71-72**|10° (1/32”) BTDC)|40° (17/32” BTDC)| |
^ ^Ign. Retard^Idle Advance^Full Advance ((79-85 HD Sportster FSM pg 3-3))^ | ^ ^Ign. Retard^Idle Advance^Full Advance ((79-85 HD Sportster FSM pg 3-3))^ | ||
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**L80-85 flywheel marks**: \\ | **L80-85 flywheel marks**: \\ | ||
- | {{:techtalk:ih:engctl:timing_mark_3_by_finkrod67_annotated_by_hippysmack.jpg?direct&300|}} ((photo by FinkRod67 of the XLFORUM annotated by Hippysmack http://xlforum.net/forums/showthread.php?t=1427992)) {{:techtalk:ih:engctl:timing_mark_4_by_finkrod67_annotated_by_hippysmack.jpg?direct&300|}} ((photo by FinkRod67 of the XLFORUM annotated by Hippysmack http://xlforum.net/forums/showthread.php?t=1427992)) \\ | + | {{:techtalk:ih:engctl:timing_mark_1_by_yochstein_annotated_by_hippysmack.jpg?direct&300|}} ((photo by Yochstein of the XLFORUM http://xlforum.net/forums/showthread.php?t=2026846)) {{:techtalk:ih:engctl:timing_mark_2_by_yochstein_annotated_by_hippysmack.jpg?direct&300|}} ((photo by Yochstein of the XLFORUM http://xlforum.net/forums/showthread.php?t=2026846)) {{:techtalk:ih:engctl:timing_mark_3_by_yochstein_annotated_by_hippysmack.jpg?direct&300|}} ((photo by Yochstein of the XLFORUM http://xlforum.net/forums/showthread.php?t=2026846)) \\ |
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* Ignition timing should be checked every 2500 miles. | * Ignition timing should be checked every 2500 miles. | ||
* Use an Inductive Timing Light to view the advanced timing of the flywheel through the accessory plastic view plug (HD-96295-65) screwed into the timing inspection hole. Make sure the view plug does not touch the flywheels. Timing light leads should be connected to the front spark plug cable, ground and battery positive terminal. Make sure the vacuum hose is properly installed at the carburetor and at the VOES. Start the engine and set the engine speed at 1300 rpm. Light will flash each time spark occurs. Loosen the sensor plate screws just enough so that plate can be shifted using a screwdriver in the notch as the light (aimed into the inspection hole) stops the timing mark in the center of the hole. | * Use an Inductive Timing Light to view the advanced timing of the flywheel through the accessory plastic view plug (HD-96295-65) screwed into the timing inspection hole. Make sure the view plug does not touch the flywheels. Timing light leads should be connected to the front spark plug cable, ground and battery positive terminal. Make sure the vacuum hose is properly installed at the carburetor and at the VOES. Start the engine and set the engine speed at 1300 rpm. Light will flash each time spark occurs. Loosen the sensor plate screws just enough so that plate can be shifted using a screwdriver in the notch as the light (aimed into the inspection hole) stops the timing mark in the center of the hole. | ||
+ | |||
+ | **Preparing the timing mark for using a timing light**: \\ | ||
+ | Clean the timing mark on the flywheel and apply a paint color that will stand out when viewing it with a timing light. ((DirtyCory of the XLFORUM http://xlforum.net/forums/showthread.php?t=1793084)) \\ | ||
+ | You can spray some brake cleaner on a Q-tip to clean the timing mark. \\ | ||
+ | Paint the timing mark with bright pink fingernail polish (or something florescent). \\ | ||
+ | Install the clear plug into the timing hole. \\ | ||
+ | It should be very near but not touching the flywheel. (go in till you touch the wheel and back off a 1/8-1/4 turn). | ||