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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Primary Belt drive by Bob Newby
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<blockquote data-quote="vibrac" data-source="post: 41787" data-attributes="member: 60"><p>You do not say twin or single</p><p>on a single</p><p>I have discussed this at length in the Grey Flash Diary</p><p>Bob knows the correct centers you just need to cut away about 5/8" of the inner wall surrounding the clutch in two places</p><p>follow his instructions on tension</p><p>I have never had a belt go in racing I change it every season but after the first change you have a spare</p><p>Oh and fit a crankshaft oil seal,forget chains ,oil ,vibration,clutch problems,adjustments,noise</p><p>Magic (well if you still have a Burman box -semi magic)</p><p>Twin</p><p>I fitted one to the 1275 race Egli racer had to do some mods on the length of main shaft, shaft gearbox nut and the pressure plate to get it to sit in far enough but that may have been sorted by now</p><p>Never fitted the outer cover as it was a new engine. the math went like this ((cover+standard clutch+ESA+chain+tensioner)-(bob newby kit+sheet of Alloy))=£400 </p><p>at least that shows all except the clutch body sits below the joint line of the cover (see photos on <a href="http://www.oldracer.co.uk" target="_blank">www.oldracer.co.uk</a>)</p><p>he also was playing with a double sided belt to also drive the dynamo rather than the 'sprocket from hell' not sure where that has got to (let us all know )</p><p>he is most approachable so ring him</p></blockquote><p></p>
[QUOTE="vibrac, post: 41787, member: 60"] You do not say twin or single on a single I have discussed this at length in the Grey Flash Diary Bob knows the correct centers you just need to cut away about 5/8" of the inner wall surrounding the clutch in two places follow his instructions on tension I have never had a belt go in racing I change it every season but after the first change you have a spare Oh and fit a crankshaft oil seal,forget chains ,oil ,vibration,clutch problems,adjustments,noise Magic (well if you still have a Burman box -semi magic) Twin I fitted one to the 1275 race Egli racer had to do some mods on the length of main shaft, shaft gearbox nut and the pressure plate to get it to sit in far enough but that may have been sorted by now Never fitted the outer cover as it was a new engine. the math went like this ((cover+standard clutch+ESA+chain+tensioner)-(bob newby kit+sheet of Alloy))=£400 at least that shows all except the clutch body sits below the joint line of the cover (see photos on [url]www.oldracer.co.uk[/url]) he also was playing with a double sided belt to also drive the dynamo rather than the 'sprocket from hell' not sure where that has got to (let us all know ) he is most approachable so ring him [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Primary Belt drive by Bob Newby
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