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techtalk:ih:engctl01c [2021/06/24 01:04] hippysmack [Prestolite Electronic Ignition System] |
techtalk:ih:engctl01c [2023/12/31 17:57] (current) hippysmack |
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| **(1979)** Upgrade to the breaker point system in which the mechanical points are replaced by a breaker-less electronic ignition on the camshaft. Timer has a rotor with one small lobe and one large lobe and a sensor that sends signal to the control module on the back of the timer inner cover. Rotor is mounted on a mechanical flywheel centrifugal advance like a point cam would be in a breaker point system. The rotor's small lobe fires the front cylinder and the large lobe fires the rear cylinder. ((1959-1985 Clymer Sportster Repair Manual pg 225))1979 Ignition Module Assembly part number 32598-78 ((1979 HD Sportster Parts Catalog)). | **(1979)** Upgrade to the breaker point system in which the mechanical points are replaced by a breaker-less electronic ignition on the camshaft. Timer has a rotor with one small lobe and one large lobe and a sensor that sends signal to the control module on the back of the timer inner cover. Rotor is mounted on a mechanical flywheel centrifugal advance like a point cam would be in a breaker point system. The rotor's small lobe fires the front cylinder and the large lobe fires the rear cylinder. ((1959-1985 Clymer Sportster Repair Manual pg 225))1979 Ignition Module Assembly part number 32598-78 ((1979 HD Sportster Parts Catalog)). | ||
| - | {{:techtalk:ih:engctl:prestolite_ignition_by_joshstrange2.jpg?direct&400|}} ((photo by joshstrange2 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1995856)) | + | {{:techtalk:ih:engctl:prestolite_ignition_by_joshstrange2.jpg?direct&400|}} ((photo by joshstrange2 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/186748-unknown-ignition?t=1995856)) |
| * **In November of 1978**, the MoCo issued a few recommendations to dealers to handle issues with the leaned out condition related to this new ignition system. Motorcycles operate with leaner air/fuel mixtures and are more sensitive to carburetor mixture settings / ignition spark. ((HD Service Bulletin #M-739 dated November 3, 1978)) | * **In November of 1978**, the MoCo issued a few recommendations to dealers to handle issues with the leaned out condition related to this new ignition system. Motorcycles operate with leaner air/fuel mixtures and are more sensitive to carburetor mixture settings / ignition spark. ((HD Service Bulletin #M-739 dated November 3, 1978)) | ||
