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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Muff to Crankcase shims and gaskets
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<blockquote data-quote="Jim Richardson" data-source="post: 32175" data-attributes="member: 1160"><p>I have just put my twin back together with 9:1 pistons, only because they were there, previous owner had fitted 2 decompression plate, I think they were 1.63mm and 2 gaskets which he felt would get it down to 8:1.</p><p>I have had no problem so far at 9:1 although Dave Hills thought it might be a bit much round town.</p><p>my thinking was that as I was trying to reduce oil consumption by fixing leaks and fitting new valve guides, I may as well try them and if it doesn't work out I will replace them with a rebore and new 8:1 pistons next winter.</p><p></p><p>JimR</p></blockquote><p></p>
[QUOTE="Jim Richardson, post: 32175, member: 1160"] I have just put my twin back together with 9:1 pistons, only because they were there, previous owner had fitted 2 decompression plate, I think they were 1.63mm and 2 gaskets which he felt would get it down to 8:1. I have had no problem so far at 9:1 although Dave Hills thought it might be a bit much round town. my thinking was that as I was trying to reduce oil consumption by fixing leaks and fitting new valve guides, I may as well try them and if it doesn't work out I will replace them with a rebore and new 8:1 pistons next winter. JimR [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Muff to Crankcase shims and gaskets
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