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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet timing
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<blockquote data-quote="Cyborg" data-source="post: 178395" data-attributes="member: 3426"><p>Thanks Greg,</p><p>I have no experience with the Burman box, but the ratio in the Commando box doesn’t feel right for my setup. The gearbox is mounted higher up than usual, the folding kickstart lever is a little longer than stock, my right leg is a little shorter than optimal, and the ignition system compounds the problem. </p><p>It has an optical encoder that records the # of degrees relative to TDC, which is fine except for the fact that it counts in both directions. In other words, if the piston comes up against compression and rolls backwards, it counts the number of degrees just the same as it would rotating forward. So… next time it fires way too early and kicks back. The cure is to rotate the engine past TDC, decompressor in ( hopefully without it rolling backwards) so the ignition system resets itself. I have a twin plug head, but was only using one plug because I need to reprogram the advance curve. I now have the second plug installed in hopes that it helps starting. If it works better, then I’ll reduce the total advance a bunch.</p><p>To save my knee, I’ll start it initially with my treadmill come paddock starter.</p></blockquote><p></p>
[QUOTE="Cyborg, post: 178395, member: 3426"] Thanks Greg, I have no experience with the Burman box, but the ratio in the Commando box doesn’t feel right for my setup. The gearbox is mounted higher up than usual, the folding kickstart lever is a little longer than stock, my right leg is a little shorter than optimal, and the ignition system compounds the problem. It has an optical encoder that records the # of degrees relative to TDC, which is fine except for the fact that it counts in both directions. In other words, if the piston comes up against compression and rolls backwards, it counts the number of degrees just the same as it would rotating forward. So… next time it fires way too early and kicks back. The cure is to rotate the engine past TDC, decompressor in ( hopefully without it rolling backwards) so the ignition system resets itself. I have a twin plug head, but was only using one plug because I need to reprogram the advance curve. I now have the second plug installed in hopes that it helps starting. If it works better, then I’ll reduce the total advance a bunch. To save my knee, I’ll start it initially with my treadmill come paddock starter. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet timing
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