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techtalk:ih:engctl01 [2021/05/20 15:44]
hippysmack [Spark Coil]
techtalk:ih:engctl01 [2021/12/02 22:01]
hippysmack [Battery Ignition (Circuit Breaker/Points/Timer/Distributor)]
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 * . . . [[techtalk:​ih:​engctl01a|See more on the Circuit Breaker Ignition System]] \\ * . . . [[techtalk:​ih:​engctl01a|See more on the Circuit Breaker Ignition System]] \\
  
-57-78 Sportsters (except XLC and XLCH)+57-78 Sportsters (except ​58-69 XLC and XLCH)
  
   * The circuit breaker ignition system has two circuits; (1)-the primary and (2)-the secondary circuits. ((1959-1964 Sportster 55 OHV FSM pg 5F-1))   * The circuit breaker ignition system has two circuits; (1)-the primary and (2)-the secondary circuits. ((1959-1964 Sportster 55 OHV FSM pg 5F-1))
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 |1985 | 31614-83A | |1985 | 31614-83A |
  
-**Brackets**:​ \\ 
  
-{{:​techtalk:​ih:​elec:​coil_mount_bracket_51526-52a_1965-1970_h_1970_ch_by_tomscybershop.jpg?​direct&​300|}} ((photo courtesy of TomsCyberShop.com www.TomsCyberShop.com)) {{:​techtalk:​ih:​elec:​coil_mounting_plate_31727-65_1965-1970_h_1970_ch_by_jrsvintageharley1990.jpg?​direct&​300|}} ((photo courtesy of Ebay seller, Jrs Vintage Harley 1990, [[https://​www.ebay.com/​str/​jrsvintageharleyparts?​_trksid=p2047675.l2563|Link to Ebay Store]] )) \\ 
  
 \\ \\
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 ==== Timing Advance ==== ==== Timing 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. 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. Advance^
-|**57-70**|15° (5/​64"​) BTDC)|45° (11/16” BTDC)|  +|**57-71**|15° (5/​64"​) BTDC)|45° (11/16” BTDC)|  
-|**71-79**|10° (1/32”) BTDC)|40° (17/32” BTDC)|+|**72-79**|10° (1/32”) BTDC)|40° (17/32” BTDC)|
 |Using Mechanical Advance mechanism = 30° range||| |Using Mechanical Advance mechanism = 30° range|||
 |Static Timing is set with Flywheel at Full Advance Mark||| |Static Timing is set with Flywheel at Full Advance Mark|||
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 |**80-82**|8° (BTDC)|26° BTDC - (600-1600 RPM)|40° BTDC) - (above 1600 RPM)| |**80-82**|8° (BTDC)|26° BTDC - (600-1600 RPM)|40° BTDC) - (above 1600 RPM)|
 ^  ^Startup Advance^Fast Idle Advance^1800-2800 RPM ((79-85 Sportster FSM pg 3-3))^ ^  ^Startup Advance^Fast Idle Advance^1800-2800 RPM ((79-85 Sportster FSM pg 3-3))^
-|**83-85**|10° (before TDC)|40° (before TDC)|55° (before TDC)|+|**83-85**|10° (BTDC)|40° (BTDC)|55° (BTDC)|
 |Using Electronic Module (computerized) allows calculating a wide range of advance spark timing|||| |Using Electronic Module (computerized) allows calculating a wide range of advance spark timing||||
 |Static Timing is set with Flywheel at TDC Mark - Used as a reference to calculate needed advance|||| |Static Timing is set with Flywheel at TDC Mark - Used as a reference to calculate needed advance||||
 +
 ==== Points Gap and Trigger Sensor Gap ==== ==== Points Gap and Trigger Sensor Gap ====