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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
CR and ignition timing on a B series single
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<blockquote data-quote="vibrac" data-source="post: 100845" data-attributes="member: 60"><p>You should have a volume of about 81cc in the head for a 7:1 which is a lot for a claimed 8:1 piston which should be about 15cc less</p><p> (I always use play dough when engine is apart a lot less mess and leakage) anyway I concur with the others given your ratio is correct everything sounds about right I think the problem is not in the head but is somewhere not addressed by your rebuild more examination along the lines suggested above is required</p></blockquote><p></p>
[QUOTE="vibrac, post: 100845, member: 60"] You should have a volume of about 81cc in the head for a 7:1 which is a lot for a claimed 8:1 piston which should be about 15cc less (I always use play dough when engine is apart a lot less mess and leakage) anyway I concur with the others given your ratio is correct everything sounds about right I think the problem is not in the head but is somewhere not addressed by your rebuild more examination along the lines suggested above is required [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
CR and ignition timing on a B series single
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