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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet Primary Drive Q's?
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<blockquote data-quote="greg brillus" data-source="post: 108007" data-attributes="member: 597"><p>1.6:1 Ratio is for the twins, singles are 1.8:1 might be over geared to buggery's if you use the twin ratio. i'm just assembling a Comet 600 with AMC box and Newby belt primary, need to have the gearbox hard up against the engine to get any slack in the belt. Like you say, no cush drive, and i still worry about the non sealed hub bearing in the Newby clutch center as to how long it will last in a road bike without stripping yearly and relubricating the bearing assembly. If I twist this belt to 90 degrees, it would fall off in service, more like 45 at most. Belts need the same adjustment as per a chain, not too loose and not too tight.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 108007, member: 597"] 1.6:1 Ratio is for the twins, singles are 1.8:1 might be over geared to buggery's if you use the twin ratio. i'm just assembling a Comet 600 with AMC box and Newby belt primary, need to have the gearbox hard up against the engine to get any slack in the belt. Like you say, no cush drive, and i still worry about the non sealed hub bearing in the Newby clutch center as to how long it will last in a road bike without stripping yearly and relubricating the bearing assembly. If I twist this belt to 90 degrees, it would fall off in service, more like 45 at most. Belts need the same adjustment as per a chain, not too loose and not too tight. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet Primary Drive Q's?
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