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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
piston failure
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<blockquote data-quote="davidd" data-source="post: 23763" data-attributes="member: 1177"><p>The only odd evidence I see is side thrust. I would expect detonation, but I am not smart enough to know if it were the cause or the result. A white hot piston will detonate any incoming mixture and the air leaks could have been there or be the result of the wild heating that was developing. You will have to check everything for straight and true, but it sounds like it was built correctly. If I were building a Comet, I would not use a Specialoid. I would opt for a CP or Arias and have the ceramic coating, not because of the failure, but because the single is subject to local heating issues in general when big loads are applied. I think the big end may tell you quite a bit about the side thrust. The piston generates 36% of the friction in an engine, so when things go wrong with it, it is always bad.</p><p> </p><p>David</p></blockquote><p></p>
[QUOTE="davidd, post: 23763, member: 1177"] The only odd evidence I see is side thrust. I would expect detonation, but I am not smart enough to know if it were the cause or the result. A white hot piston will detonate any incoming mixture and the air leaks could have been there or be the result of the wild heating that was developing. You will have to check everything for straight and true, but it sounds like it was built correctly. If I were building a Comet, I would not use a Specialoid. I would opt for a CP or Arias and have the ceramic coating, not because of the failure, but because the single is subject to local heating issues in general when big loads are applied. I think the big end may tell you quite a bit about the side thrust. The piston generates 36% of the friction in an engine, so when things go wrong with it, it is always bad. David [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
piston failure
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