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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
HD Decompressors (Solenoid)
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<blockquote data-quote="greg brillus" data-source="post: 166047" data-attributes="member: 597"><p>Harley's have been having starter issues for years........the bigger or more high spec the engine the worse the problem is........If you look at all other bike engines like larger V twins, they all turn the crank via a one way clutch and some gearing.........Our issue is turning a larger chainwheel or clutch pully verses a smaller crank sprocket/pully so the turning ratio to the starter motor is very poor........On the starter pinion verses the crank sprocket the ratio is about 5:1 forget the internal gearing within the starter, that is a constant weather it is a car engine or for a bike, its still the same.......On a car engine like a small or big block Chevy, the pinion to ring gear ratio is about 10:1.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 166047, member: 597"] Harley's have been having starter issues for years........the bigger or more high spec the engine the worse the problem is........If you look at all other bike engines like larger V twins, they all turn the crank via a one way clutch and some gearing.........Our issue is turning a larger chainwheel or clutch pully verses a smaller crank sprocket/pully so the turning ratio to the starter motor is very poor........On the starter pinion verses the crank sprocket the ratio is about 5:1 forget the internal gearing within the starter, that is a constant weather it is a car engine or for a bike, its still the same.......On a car engine like a small or big block Chevy, the pinion to ring gear ratio is about 10:1. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
HD Decompressors (Solenoid)
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