Differences

This shows you the differences between two versions of the page.

--- techtalk:ih:engctl01a [2018/09/19 10:06]
hippysmack [External Circuit Breaker (57-70)]
+++ techtalk:ih:engctl01a [2023/12/31 17:31] (current)
hippysmack [Auto Advance / Breaker Weight Springs]
@@ Line 9: / Line 9: @@
   * The breaker cam and contact points open and close the low tension circuit between the battery and the ignition coil. \\ (which causes the coil to produce high voltage discharge to the spark plugs)
   * The circuit breaker also times the discharge for proper engine firing.
 ====== External Circuit Breaker (57-70) ======
-|  Circuit Breaker ((photo by Pablo83 of the XLFORUM http://xlforum.net/forums/showthread.php?threadid=1569256&page=7))  | 1960 Sportster Circuit Breaker ((photo by Ozark of the XLFORUM http://xlforum.net/forums/showthread.php?p=2509874))  |
+|  Circuit Breaker ((photo by Pablo83 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/144683-magneto-ch-porn-thread/page7?threadid=1569256&page=7))  | 1960 Sportster Circuit Breaker ((photo by Ozark of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/92341-just-picked-up-a-1960-basket-case/page2#post1921155))  |
 |{{:techtalk:ih:engctl:circuit_breaker_by_pablo83.jpg?direct&300|}}|{{:techtalk:ih:engmech:1960_sportster_circuit_breaker_by_ozark.jpg?direct&300|}}|
@@ Line 20: / Line 19: @@
   * The magneto has been changed out to a circuit breaker ignition on many XLCHs
-|  Circuit breaker ignition on a 70 model XLCH  ((photo by savagegarden of the XLFORUM http://xlforum.net/forums/showthread.php?t=1844816))  |
+|  Circuit breaker ignition on a 70 model XLCH  ((photo by savagegarden of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/172193-advantages-of-using-a-magneto?t=1844816))  |
 |{{:techtalk:ih:engctl:circuit_breaker_ignition_on_a_70_xlch.jpg?direct&300|}}|
-  * You've got 2 sets of gears that turn the circuit breaker. ((needspeed of the XLFORUM http://xlforum.net/forums/showthread.php?t=2033659&highlight=circuit+breaker))
+  * You've got 2 sets of gears that turn the circuit breaker. ((needspeed of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/190797-1968-xlch-900-timing-question?t=2033659&highlight=circuit+breaker))
     * The pinion turning the cam gear.
     * Then the cam gear turning the circuit breaker (distributor).
@@ Line 31: / Line 30: @@
     * If you've got advance weights, they and the point cam can become sloppy.
     * So there's a lot that can contribute to the timing jumping around.
+====== Contact Points ======
+===== Single Contact Points - Manual Advance =====
+**A single contact point circuit breaker is operated by a cam with a narrow lobe and a wide lobe**. ((1959-1964 Sportster 55 OHV FSM pg 5F-1))
+  - The narrow lobe times the front cylinder.
+  - The wide lobe times the rear cylinder.
+  * A single ignition coil fires both spark plugs at the same time.
+    * One cylinder on compression stroke, firing the combustion gas creating the power stroke.
+    * The other cylinder through the exhaust stroke (wasted spark).
+    * The non-firing plug will run at the same temperature as the firing plug as long as they're all the same heat range. ((rivethog of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/178207-69-dual-plug-heads-with-timer/page4?t=1916320&page=4))
+      * If the firing plugs aren't building up carbon, the "spares" shouldn't either.
+      * A spark plug's running temperature/heat range isn't correlated to being connected to the coil.
+  * Timing is advanced or retarded by manually rotating the circuit breaker base in relation to the breaker cam.
+|{{:techtalk:ih:engctl:circuit_breaker_1_by_1957xler.jpg?direct&300|}}|{{:techtalk:ih:engctl:circuit_breaker_2_by_1957xler.jpg?direct&300|}}|
+|  Single Point Circuit Breaker on a 57 XL ((photos by 1957xler of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/171998-valve-timing-off?t=1844586))  ||
+===== Single Contact Points - Auto Advance =====
+**The single set of points are operated the same way as the manual advance (by a cam with a narrow lobe and a wide lobe) with the addition flyweights**. \\ (the spark timing cam is advanced automatically with engine speed) ((1959-1964 Sportster 55 OHV FSM pg 5F-1))
+  - The narrow lobe times the front cylinder.
+  - The wide lobe times the rear cylinder.
+  * A single ignition coil fires both spark plugs at the same time.
+    * One cylinder on compression stroke, firing the combustion gas creating the power stroke.
+    * The other cylinder through the exhaust stroke.
+  * Timing is advanced or retarded with an increase or decrease of engine speed by the action of the flyweights.
+===== Dual Contact Points =====
+**Two independent sets of points are operated by separate cam lobes** (each having it's own cam). ((1959-1964 Sportster 55 OHV FSM pg 5F-1))
+  * Each breaker cam opens the points individually which fires to the alternate cylinders with every revolution of the crankshaft
+  * Dual ignition coils (one for each spark plug) fire each cylinder independently.
+  * Timing is advanced or retarded by the breaking of each set of points by the single lobe cam on the timer shaft.
+===== Setting / Adjusting Point Gap =====
+Point gap should be set before ignition timing adjustments. Incorrect point gap spacing will affect timing. ((57-69 HD Sportster FSM pg 5F-2)) \\
+**Single Contact Point Circuit Breaker**. ((57-69 HD Sportster FSM pg 5F-2)) \\
+Point gap spacing should be exactly .020" (measured with a feeler gauge) when the fiber cam follower is on the highest point of the cam. \\
+  * Loosen the points lock down screw and use the eccentric adjusting screw to move the point gap to the correct setting.
+  * Tighten the lock down screw and re-check the gap, repeat if it moved.
+**Dual Contact Point Circuit Breaker**. ((57-69 HD Sportster FSM pg 5F-2)) \\
+Point gap spacing should be exactly .022" (measured with a feeler gauge) when the fiber cam follower is on the highest point of the cam. \\
+Check ignition timing whenever dual points are adjusted. \\
+Any change in the rear point gap affects timing.
+  * Front (marked with an "F") and rear points are adjusted separately.
+  * Loosen the front lock down screw and use the eccentric adjusting screw to move the point gap to the correct setting.
+  * Tighten the lock down screw and re-check the gap, repeat if it moved.
+  * Then repeat the procedure for the rear points.
+  * Both point gaps should have the same gap spacing.
+===== Setting /Adjusting Ignition Timing =====
+==== Manual Advance Single Point Circuit Breaker ====
+==== Auto Advance Single Point Circuit Breaker ====
+==== Manual Advance Dual Point Circuit Breaker ====
 ====== Internal Circuit Breaker (71-78) ======
 ===== Roll Pin =====
-AKA "split pins". These are hollow pins that have a split in them and are held in holes by their own spring tension. ((needspeed of the XLFORUM http://xlforum.net/forums/showthread.php?t=2003348)) \\
+AKA "split pins". These are hollow pins that have a split in them and are held in holes by their own spring tension. ((needspeed of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/187639-timing-180-deg-out?t=2003348)) \\
-It is possible to have it 180° out by mashing down the pin while tightening everything up. ((Ferrous Head of the XLFORUM http://xlforum.net/forums/showthread.php?t=2003348&page=2)) \\
+It is possible to have it 180° out by mashing down the pin while tightening everything up. ((Ferrous Head of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/187639-timing-180-deg-out/page2?t=2003348&page=2)) \\
 It's also common for the breaker cam pin to be sheared off flush with the base and covered in grime so you can't tell the correct orientation for the cam. \\
-It'll install both ways like this, but only one position will fire the plugs correctly. ((doodah man of the XLFORUM http://xlforum.net/forums/showthread.php?t=2003348&page=2)) \\
+It'll install both ways like this, but only one position will fire the plugs correctly. ((doodah man of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/187639-timing-180-deg-out/page2?t=2003348&page=2)) \\
-If the first roll pin is pushed too deep, it can cause problems with getting both gaps even. \\ It will cock the advanced unit and not let it seat flush on the cam. ((Sadsack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2003348&page=2)) \\
+If the first roll pin is pushed too deep, it can cause problems with getting both gaps even. \\ It will cock the advanced unit and not let it seat flush on the cam. ((Sadsack of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/187639-timing-180-deg-out/page2?t=2003348&page=2)) \\
 If the bike will backfire, spit and cough very badly with the cam plate adjusted, \\
-Check for missing, bent or destroyed roll pins on the plate. ((Ferrous Head of the XLFORUM http://xlforum.net/forums/showthread.php?t=2003348&page=2)) \\
+Check for missing, bent or destroyed roll pins on the plate. ((Ferrous Head of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/187639-timing-180-deg-out/page2?t=2003348&page=2)) \\
-|The 1st roll pin is on the top side of timing \\ plate assembly. ((photo by The Doctor71 of the XLFORUM http://xlforum.net/forums/showthread.php?t=2003348))|The 2nd roll pin is on the back side of the \\ timing plate assembly. ((photo by The Doctor71 of the XLFORUM http://xlforum.net/forums/showthread.php?t=2003348))|During installation, the back side roll pin \\ aligns with the notch in the #2 cam ((photo by The Doctor71 of the XLFORUM http://xlforum.net/forums/showthread.php?t=2003348))|
+|The 1st roll pin is on the top side of timing \\ plate assembly. ((photo by The Doctor71 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/187639-timing-180-deg-out?t=2003348))|The 2nd roll pin is on the back side of the \\ timing plate assembly. ((photo by The Doctor71 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/187639-timing-180-deg-out?t=2003348))|During installation, the back side roll pin \\ aligns with the notch in the #2 cam ((photo by The Doctor71 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/187639-timing-180-deg-out?t=2003348))|
 |{{:techtalk:ih:engctl:nosecone_ignition_roll_pin_1_by_the_doctor71.jpg?direct&250|}}|{{:techtalk:ih:engctl:nosecone_ignition_roll_pin_2_by_the_doctor71.jpg?direct&250|}}|{{:techtalk:ih:engctl:nosecone_ignition_roll_pin_3_by_the_doctor71.jpg?direct&250|}}|
@@ Line 50: / Line 105: @@
 |{{:techtalk:ih:engctl:crank_tdc_and_cam_notch_by_ixl2relax.jpg?direct&300|}}
-====== Timing (71-78) ======
+====== Ignition Timing ======
 ===== Setting Ignition Timing with a Cigarette Paper =====
 Also, see this [[https://www.youtube.com/watch?v=mKVh4pbyh2A|video on setting the timing]] ((video by Shadowdog500 of the XLFORUM https://www.youtube.com/watch?v=mKVh4pbyh2A)) \\
-This can be done without a strobe light or a multi-meter. ((Article by Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?page=11&t=39764)) \\
+This can be done without a strobe light or a multi-meter. ((Article by Hopper 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/page11?page=11&t=39764)) \\
 This is the old fashioned way of timing a points equipped Harley (providing the ignition system and cam gears are in good condition). \\
@@ Line 68: / Line 123: @@
   * The points open the widest just as they are initially opening. \\ If you keep turning the engine to the middle of the lobe, they close up a couple of thousandths.
-|This is the locking screw for adjusting the points gap. \\ Note, leave the condenser hanging out for room to \\ do the timing, later. ((photo by Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?page=11&t=39764))|This is the notch to lever the points adjustment to \\ open or close the gap. ((photo by Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?page=11&t=39764))|Holding a 3/8" socket drive like this won't allow you \\ to get too much leverage and break that skinny bolt. ((photo by Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?page=11&t=39764))|
+|This is the locking screw for adjusting the points gap. \\ Note, leave the condenser hanging out for room to \\ do the timing, later. ((photo by Hopper 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/page11?page=11&t=39764))|This is the notch to lever the points adjustment to \\ open or close the gap. ((photo by Hopper 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/page11?page=11&t=39764))|Holding a 3/8" socket drive like this won't allow you \\ to get too much leverage and break that skinny bolt. ((photo by Hopper 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/page11?page=11&t=39764))|
 |{{:techtalk:ih:engmech:setting_ign_timing_1_by_hopper.jpg?direct&300|}}|{{:techtalk:ih:engmech:setting_ign_timing_2_by_hopper.jpg?direct&300|}}|{{:techtalk:ih:engmech:setting_ign_timing_3_by_hopper.jpg?direct&300|}}|
 ==== Timing Adjustment ====
-  * First, set the front cylinder on the compression stroke by feeling with my thumb over the front plug hole. \\ See also [[techtalk:ref:trouble05#find_compression_using_the_finger_method|Using the finger method to find the compression stroke]] and [[techtalk:ref:trouble05#find_compression_using_a_tdc_whistle|Using a TDC Whistle to find the compression stroke]].
+  * First, set the front cylinder on the compression stroke. \\ You [[techtalk:ref:svcproc22#find_tdc_compression_using_the_rocker_arms_as_a_visual|can watch for both front push rods to become bottomed out]] ((doodah man of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/194724-static-timing-identifying-wide-small-cam-lobes?t=2071019&highlight=circuit+breaker)) (collapse the push rod tubes to see the push rod action) \\ See also [[techtalk:ref:svcproc22#find_compression_using_the_finger_method|Using the finger method to find the compression stroke]] and [[techtalk:ref:svcproc22#find_compression_using_a_tdc_whistle|Using a TDC Whistle to find the compression stroke]].
   * Next, remove timing hole plug from the left crankcase. \\ Put the front cylinder advance timing mark in the center of the hole while still on the compression stroke.
   * This sets the front piston at 40° before Top Dead Center (TDC) on the compression stroke. \\ (where the spark occurs when the engine is revving at high revs, with the auto advance unit at full advance).
-|Front flywheel timing mark in inspection window. \\ Front cylinder on compression stroke. ((photo by Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?page=11&t=39764))|Rear flywheel timing mark in inspection window. \\ Rear cylinder on compression stroke. ((photo by Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?page=11&t=39764))|
+|Front flywheel timing mark in inspection window. \\ Front cylinder on compression stroke. ((photo by Hopper 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/page11?page=11&t=39764))|Rear flywheel timing mark in inspection window. \\ Rear cylinder on compression stroke. ((photo by Hopper 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/page11?page=11&t=39764))|
 |{{:techtalk:ih:engmech:setting_ign_timing_4_by_hopper.jpg?direct&300|}}|{{:techtalk:ih:engmech:setting_ign_timing_8_by_hopper.jpg?direct&300|}}|
@@ Line 88: / Line 143: @@
   * If it sticks there, or slips out before the points cam reaches the full advance position and stops, adjust the points backing plate to move the points to the right position.
-|Cigarette paper in place, spanner to turn points cam \\ to full advance. ((photo by Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?page=11&t=39764))|This screw, and the one at the top, anchor the \\ backing plate and must be loosend to adjust timing. ((photo by Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?page=11&t=39764))|Then, lever the whole backing plate a fraction back \\ or forth using this notch for your screwdriver and \\ then tighten up the locking screws when your done. ((photo by Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?page=11&t=39764))|
+|Cigarette paper in place, spanner to turn points cam \\ to full advance. ((photo by Hopper 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/page11?page=11&t=39764))|This screw, and the one at the top, anchor the \\ backing plate and must be loosend to adjust timing. ((photo by Hopper 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/page11?page=11&t=39764))|Then, lever the whole backing plate a fraction back \\ or forth using this notch for your screwdriver and \\ then tighten up the locking screws when your done. ((photo by Hopper 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/page11?page=11&t=39764))|
 |{{:techtalk:ih:engmech:setting_ign_timing_5_by_hopper.jpg?direct&300|}}|{{:techtalk:ih:engmech:setting_ign_timing_6_by_hopper.jpg?direct&300|}}|{{:techtalk:ih:engmech:setting_ign_timing_7_by_hopper.jpg?direct&300|}}|
@@ Line 101: / Line 156: @@
 ==== Troubleshooting ====
-  * If your advance cam will not move, you need to take a look at the advance unit in behind the point plate. ((Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?t=39764&page=12))
+  * If your advance cam will not move, you need to take a look at the advance unit in behind the point plate. ((Hopper 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/page12?t=39764&page=12))
     * It may be damaged or froze up.
   * Point gap should be the same between the large and small cam lobes. ((70-78 HD Sportster FSM pg 5-30))
     * If point gap exceeds .004" between them, the cam lobe is running eccentric and it should be corrected.
     * Loosen the center bolt and reposition the advance weight assembly toward the widest point gap to equalize the gap. ((70-78 HD Sportster FSM pg 5-35))
-====== Contact Points ======
-===== Single Contact Points - Manual Advance =====
-**A single contact point circuit breaker is operated by a cam with a narrow lobe and a wide lobe**. ((1959-1964 Sportster 55 OHV FSM pg 5F-1))
-  - The narrow lobe times the front cylinder.
-  - The wide lobe times the rear cylinder.
-  * A single ignition coil fires both spark plugs at the same time.
-    * One cylinder on compression stroke, firing the combustion gas creating the power stroke.
-    * The other cylinder through the exhaust stroke.
-  * Timing is advanced or retarded by manually rotating the circuit breaker base in relation to the breaker cam.
-|{{:techtalk:ih:engctl:circuit_breaker_1_by_1957xler.jpg?direct&300|}}|{{:techtalk:ih:engctl:circuit_breaker_2_by_1957xler.jpg?direct&300|}}|
-|  Single Point Circuit Breaker on a 57 XL ((photos by 1957xler of the XLFORUM http://xlforum.net/forums/showthread.php?t=1844586))  ||
-===== Single Contact Points - Auto Advance =====
-**The single set of points are operated the same way as the manual advance (by a cam with a narrow lobe and a wide lobe) with the addition flyweights**. \\ (the spark timing cam is advanced automatically with engine speed) ((1959-1964 Sportster 55 OHV FSM pg 5F-1))
-  - The narrow lobe times the front cylinder.
-  - The wide lobe times the rear cylinder.
-  * A single ignition coil fires both spark plugs at the same time.
-    * One cylinder on compression stroke, firing the combustion gas creating the power stroke.
-    * The other cylinder through the exhaust stroke.
-  * Timing is advanced or retarded with an increase or decrease of engine speed by the action of the flyweights.
-===== Dual Contact Points =====
-**Two independent sets of points are operated by separate cam lobes** (each having it's own cam). ((1959-1964 Sportster 55 OHV FSM pg 5F-1))
-  * Each breaker cam opens the points individually which fires to the alternate cylinders with every revolution of the crankshaft
-  * Dual ignition coils (one for each spark plug) fire each cylinder independently.
-  * Timing is advanced or retarded by the breaking of each set of points by the single lobe cam on the timer shaft.
 ====== Auto Advance / Breaker Weight Springs ======
   * Starting on January 3, 1969, the MoCo changed the size of the wire of the two ignition timer weight springs on Electra Glide and Sportster models to increase the speed at which timing advance occurred. This was to insure that the spark timing would be fully retarded at cranking speed and will advance gradually as RPMs increase to the fully advanced position. ((HD Service Bulletin #562A dated May 1, 1969 pg OC-261))
-  * Auto advance 1st appeared on the 1965 XLH. It was also used on the 1966 XLH also. ((Dr Dick http://xlforum.net/forums/showthread.php?t=1062720&page=22))
+  * Auto advance 1st appeared on the 1965 XLH. It was also used on the 1966 XLH also. ((Dr Dick https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts/page22?t=1062720&page=22))
-  * For 1967 models, the advance mechanism got changed to the familiar setup and a tach drive was added. ((Dr Dick http://xlforum.net/forums/showthread.php?t=1062720&page=22)) ((HD Service Bulletin #562A dated May 1, 1969 pg OC-261))
+  * For 1967 models, the advance mechanism got changed to the familiar setup and a tach drive was added. ((Dr Dick https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts/page22?t=1062720&page=22)) ((HD Service Bulletin #562A dated May 1, 1969 pg OC-261))
-  * The -67 ones allow for better low speed around town manners,  but they allow a little more 'kickback' than the -69 when hot starting using the button.((Dr Dick http://xlforum.net/forums/showthread.php?t=1062720&page=22)) ((HD Service Bulletin #562A dated May 1, 1969 pg OC-261))
+  * The -67 ones allow for better low speed around town manners,  but they allow a little more 'kickback' than the -69 when hot starting using the button.((Dr Dick https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts/page22?t=1062720&page=22)) ((HD Service Bulletin #562A dated May 1, 1969 pg OC-261))
-  * The black -70 springs in these timers don't seem to work nearly as good as when using either -67 or -69. ((Dr Dick http://xlforum.net/forums/showthread.php?t=1062720&page=22))
+  * The black -70 springs in these timers don't seem to work nearly as good as when using either -67 or -69. ((Dr Dick https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts/page22?t=1062720&page=22))
@@ Line 156: / Line 175: @@
 |1971-1979 XLH / XLCH|32605-70 ((1954-1978 HD Sportster Parts Catalog pg 47)) |
-|The 1969 spring is dirty, not black ((photo by Dr Dick http://xlforum.net/forums/showthread.php?t=1062720&page=22)) |  Both have 10 coils ((photos by Dr Dick http://xlforum.net/forums/showthread.php?t=1062720&page=22))  ||
+|The 1969 spring is dirty, not black ((photo by Dr Dick https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts/page22?t=1062720&page=22)) |  Both have 10 coils ((photos by Dr Dick https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts/page22?t=1062720&page=22))  ||
 |{{:techtalk:ih:engctl:breaker_weight_spring_1_by_dr_dick.jpg?direct&300|}}|{{:techtalk:ih:engctl:breaker_weight_spring_2_by_dr_dick.jpg?direct&300|}}|{{:techtalk:ih:engctl:breaker_weight_spring_3_by_dr_dick.jpg?direct&300|}}|
   * Before checking ignition timing, remove the circuit breaker plate nuts and plate cover to make sure the flyweights will move freely. The cam must return back to retarded position when the engine is stopped. If it doesn't retard fully, it usually causes failure of the starter drive. ((HD Service Bulletin #562A dated May 1, 1969 pg OC-261))
   * Also, on 1967 and later models, make sure that the bent end of the flyweight spring is hooked through the bottom hole and the upper loop grips the retaining groove in the pin tightly. ((HD Service Bulletin #562A dated May 1, 1969 pg OC-261))
   * Replace the breaker plate cover and set the point gap at 0.020" before checking / setting the advance timing. ((HD Service Bulletin #562A dated May 1, 1969 pg OC-261))
 ====== Circuit Breaker Cam ======
 The circuit breaker cam, or ignition timer cam, (newly designed for the 1971 model year) was redesigned for the 1972 model year and was recommended as a replacement for parts order on 1971 model Sportster, Electra Glide and Super Glide models. The 1971 (32542-70) cam had a more rounder profile while the 1972 cam (32542-70A) was more radical with sharper corners at the sides with a flat or straight edge ascend to the cam top center from each side. The 1972 cam allowed greater range in point gap adjustment making (the adjustment less critical) and timing more consistent from cylinder to cylinder. Point gap specs remained the same between the two cams but the dwell changed from 90° to 140° with the '72 cam.

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