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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Twin Cam Timing Conundrum!
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<blockquote data-quote="Rob H" data-source="post: 90141" data-attributes="member: 1913"><p>Pulling my hair out a bit, well whats left of it. </p><p></p><p>I am putting in a new set of cams and looking to get the timing as best as I can. When all set up as per Richardson I find the difference between the front cylinder cam and rear cylinder cam on intake lift is 5 deg. The front cam trailing by 5 deg compared to the rear.</p><p></p><p>In a bid to get them closer thought that if I advanced the front cylinder cam by one tooth (as the pinion has 48 teeth = 7.5 deg) then the difference between the two cams would be only 2.5 deg with the front cylinder cam now being slightly in advance.</p><p></p><p>However when I have done this and I have done it several times to make sure, I find the intake lift on the front cylinder cam advances <strong>15 deg not 7.5 deg</strong> making the difference between the two worse at 10 deg.</p><p></p><p>Am I missing something? Any help to stop me going crazy would be very much appreciated</p></blockquote><p></p>
[QUOTE="Rob H, post: 90141, member: 1913"] Pulling my hair out a bit, well whats left of it. I am putting in a new set of cams and looking to get the timing as best as I can. When all set up as per Richardson I find the difference between the front cylinder cam and rear cylinder cam on intake lift is 5 deg. The front cam trailing by 5 deg compared to the rear. In a bid to get them closer thought that if I advanced the front cylinder cam by one tooth (as the pinion has 48 teeth = 7.5 deg) then the difference between the two cams would be only 2.5 deg with the front cylinder cam now being slightly in advance. However when I have done this and I have done it several times to make sure, I find the intake lift on the front cylinder cam advances [B]15 deg not 7.5 deg[/B] making the difference between the two worse at 10 deg. Am I missing something? Any help to stop me going crazy would be very much appreciated [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Twin Cam Timing Conundrum!
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