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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Valve Timing
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<blockquote data-quote="vibrac" data-source="post: 127025" data-attributes="member: 60"><p>I have pushed a few cams in wheels on the racer never looking at any (or maybe there were no) timing marks and then timed using the 4degree rule because as far as I can see it matters not a jot where the cam is on a symetrical wheel if you are using that method. Having said that the 'keyway' is a nice guide in the early stages so I try and get it somewhere near.</p><p>Incidentally on a Comet I always work backwards hold the cam in the equal opening position with a screw and washer in the timing case and work back down the gears finally slipping the half time pinion in the nearest slot when the crank is rotated to 4 degrees.</p></blockquote><p></p>
[QUOTE="vibrac, post: 127025, member: 60"] I have pushed a few cams in wheels on the racer never looking at any (or maybe there were no) timing marks and then timed using the 4degree rule because as far as I can see it matters not a jot where the cam is on a symetrical wheel if you are using that method. Having said that the 'keyway' is a nice guide in the early stages so I try and get it somewhere near. Incidentally on a Comet I always work backwards hold the cam in the equal opening position with a screw and washer in the timing case and work back down the gears finally slipping the half time pinion in the nearest slot when the crank is rotated to 4 degrees. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Valve Timing
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