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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet - Primary Chain
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<blockquote data-quote="Martyn Goodwin" data-source="post: 45368" data-attributes="member: 2433"><p>Just back from a 95 mile shakedown run after putting the Comet back together. Crisp but sunny winters day and dry roads.</p><p></p><p>During reassembly of the bike I reset the timing. In the past I was in the habit of setting it fully retarded at 4 BTDC to ensure an easy start. After some sage advise from more knowledgeable folks I switched to setting it with the ATD fully advanced at 38 BTDC, which gave a retarded setting of 8 BTDC. Starting was not difficult at all and the bike seemed to run a lot better and spin more freely - of course it could also be imagenitis on my part! FWIW I am using a CP piston with 7.2:1 compression, Mk1 Cam and 95 Octane (RON) fuel.</p><p></p><p>In addition to the kick start problem I was also troubled with a gross oil leak around the opening in the case where the Alton mounted. As my Comet is running a magneto I do have a bit of wriggle room in the sparks department so I made the decision to remove the Alton and refit my Miller generator (that I had rebuild about 6 months back) and the regulator that converts it to 12 volt output. Bonus with the generator is that a "proper" lipped seal is used, so there should be no oil leak. In case any are wondering I run LED indicators, park light and tail/stop light - oh and there is a LED inside the speedo as well. For the headlight I have a 35/35W halogen.</p><p></p><p>Anyway - cutting to the chase. After today's shakedown run absolutely no sign of oil leaks anywhere, other than that thrown off the rear chain. And not a trace of kick start jamming either.</p><p></p><p>Time to open a bottle of Red and celebrate while the going is good.</p><p></p><p>Martyn</p><p></p><p>(PS I switched to Firefox and the carriage return seems to be working)</p></blockquote><p></p>
[QUOTE="Martyn Goodwin, post: 45368, member: 2433"] Just back from a 95 mile shakedown run after putting the Comet back together. Crisp but sunny winters day and dry roads. During reassembly of the bike I reset the timing. In the past I was in the habit of setting it fully retarded at 4 BTDC to ensure an easy start. After some sage advise from more knowledgeable folks I switched to setting it with the ATD fully advanced at 38 BTDC, which gave a retarded setting of 8 BTDC. Starting was not difficult at all and the bike seemed to run a lot better and spin more freely - of course it could also be imagenitis on my part! FWIW I am using a CP piston with 7.2:1 compression, Mk1 Cam and 95 Octane (RON) fuel. In addition to the kick start problem I was also troubled with a gross oil leak around the opening in the case where the Alton mounted. As my Comet is running a magneto I do have a bit of wriggle room in the sparks department so I made the decision to remove the Alton and refit my Miller generator (that I had rebuild about 6 months back) and the regulator that converts it to 12 volt output. Bonus with the generator is that a "proper" lipped seal is used, so there should be no oil leak. In case any are wondering I run LED indicators, park light and tail/stop light - oh and there is a LED inside the speedo as well. For the headlight I have a 35/35W halogen. Anyway - cutting to the chase. After today's shakedown run absolutely no sign of oil leaks anywhere, other than that thrown off the rear chain. And not a trace of kick start jamming either. Time to open a bottle of Red and celebrate while the going is good. Martyn (PS I switched to Firefox and the carriage return seems to be working) [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet - Primary Chain
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