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General Minitrail Talk
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bogging bike in 2nd gear
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<blockquote data-quote="69ST" data-source="post: 120506" data-attributes="member: 5"><p>I've seen 1980s models as late as 1987, actually. Unfortunately, there's F/A for documentation covering the details unique to any of them produced between `83 & `91. So...educated guesses are as good as it's going to get, until such time as someone digs into the motors of those models to verify what's inside.</p><p></p><p>I'm assuming that you've verified point gap. Next step is to verify cam timing. It may be off by one tooth...easy to do during reassembly, especially if you're inexperienced with these motors.</p><p></p><p>If the problem persists after verifying those two parameters, next step is making the main fuel circuit richer. Start by dropping the jet needle C-clip to the bottom groove. If the engine runs better, then you're on the right track. If there's no difference, you may have lowered the static CR with a head/piston dome mismatch. Not knowing which piston crown and combustion chamber dome configuration of the original head makes this a guessing game, for the time being.</p></blockquote><p></p>
[QUOTE="69ST, post: 120506, member: 5"] I've seen 1980s models as late as 1987, actually. Unfortunately, there's F/A for documentation covering the details unique to any of them produced between `83 & `91. So...educated guesses are as good as it's going to get, until such time as someone digs into the motors of those models to verify what's inside. I'm assuming that you've verified point gap. Next step is to verify cam timing. It may be off by one tooth...easy to do during reassembly, especially if you're inexperienced with these motors. If the problem persists after verifying those two parameters, next step is making the main fuel circuit richer. Start by dropping the jet needle C-clip to the bottom groove. If the engine runs better, then you're on the right track. If there's no difference, you may have lowered the static CR with a head/piston dome mismatch. Not knowing which piston crown and combustion chamber dome configuration of the original head makes this a guessing game, for the time being. [/QUOTE]
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bogging bike in 2nd gear
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