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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Nip up Comet
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<blockquote data-quote="Tony Wilkinson" data-source="post: 111943" data-attributes="member: 4387"><p>Yes Greg I have read about this oil feed in the liner. When I strip the engine I will measure to see where the rings are in relation to the oil feed hole... This is one of the problems of not having a long history with the bike. I bought from a dealer but the owner before that had the bike for 18 years and never really used it. He told me that the previous owner to him had rebuilt the engine and had it rebored with new piston. This bears out as the piston does indeed look new and the bore still has clear honing marks. I am concerned that the nip up has smeared/scored the piston and may be stopping the oil ring in particular from doing it's job properly.</p><p> I will post my conclusions soon.</p></blockquote><p></p>
[QUOTE="Tony Wilkinson, post: 111943, member: 4387"] Yes Greg I have read about this oil feed in the liner. When I strip the engine I will measure to see where the rings are in relation to the oil feed hole... This is one of the problems of not having a long history with the bike. I bought from a dealer but the owner before that had the bike for 18 years and never really used it. He told me that the previous owner to him had rebuilt the engine and had it rebored with new piston. This bears out as the piston does indeed look new and the bore still has clear honing marks. I am concerned that the nip up has smeared/scored the piston and may be stopping the oil ring in particular from doing it's job properly. I will post my conclusions soon. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Nip up Comet
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