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techtalk:ih:engctl01 [2021/04/28 00:33] ixl2relax [Setting Ignition Timing] |
techtalk:ih:engctl01 [2023/07/10 21:24] ixl2relax [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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| **PRECAUTION:** If the engine happens to stop on the 'dwell' part of the cam position lobe, the GROUND thru points will keep power active on the coil if the RUN switch is ON. This means, if you turned the key on (or leave it on), with the RUN switch ON, without starting the engine, the coil will be in constant current saturation and will eventually 'burn up' the internal windings. | **PRECAUTION:** If the engine happens to stop on the 'dwell' part of the cam position lobe, the GROUND thru points will keep power active on the coil if the RUN switch is ON. This means, if you turned the key on (or leave it on), with the RUN switch ON, without starting the engine, the coil will be in constant current saturation and will eventually 'burn up' the internal windings. | ||
| - | + | ||
| + | {{:techtalk:ih:engctl:ignitionsystem-points.jpg?500|}}((Diagram by IXL2Relax)) | ||
| + | |||
| + | (Aftermarket Points/Condenser Kit MC-DR2240X is typical for 71-78 models) | ||
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| + | \\ | ||
| ===== Magneto Ignition System ===== | ===== Magneto Ignition System ===== | ||
| * . . . [[techtalk:ih:engctl01b|See more on the Magneto Ignition System]] \\ | * . . . [[techtalk:ih:engctl01b|See more on the Magneto Ignition System]] \\ | ||
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| - | ===== Coil ===== | + | ===== Spark Coil ===== |
| **Coil Mix-up on 1973-1974 Models** | **Coil Mix-up on 1973-1974 Models** | ||
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| | 1980-1984 | 31609-80 | | | 1980-1984 | 31609-80 | | ||
| |1985 | 31614-83A | | |1985 | 31614-83A | | ||
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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 ==== | ||
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| It should be very near but not touching the flywheel. (go in until you touch the wheel and back off a 1/8-1/4 turn). | It should be very near but not touching the flywheel. (go in until you touch the wheel and back off a 1/8-1/4 turn). | ||
| - | The OEM Timing Rotor for 1980-82 is 32401-80 (Silver color). | + | \\ |
| + | |||
| + | The OEM Timing Rotor used for electronic ignitions on 1980-82 models is 32401-80 (Silver color). | ||
| For 1983-later, the OEM Timing Rotor is 32402-83 (Gold color). This later version is usually also used for aftermarket nosecone electronic ignitions installed in Ironhead models. | For 1983-later, the OEM Timing Rotor is 32402-83 (Gold color). This later version is usually also used for aftermarket nosecone electronic ignitions installed in Ironhead models. | ||
