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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Nip up Comet
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<blockquote data-quote="oexing" data-source="post: 112050" data-attributes="member: 1493"><p>Basically ring gaps should be set by the manufacturer, but then, I once had a brand new Mahle auto piston taken from the original packing. When trying to slip the cylinder over it It stopped at the oil control ring and even a lot of push would not get the piston inside. So in the end I stopped trying and inspected the ring, had a nasty scratch in the cylinder bore from trying. Obviously that ring was for the next oversize when I took measures !! </p><p> In our case would a too small ring gap produce nip ups on the piston skirt like shown ?? I would not think so. </p><p>How is the fit of the cylinder liner in the crank case ? An easy slip fit with not the least resistance when shoving down ?? Otherwise I´d suspect a deformed liner from an imperfect case, less so from head studs. </p><p></p><p> Vic</p></blockquote><p></p>
[QUOTE="oexing, post: 112050, member: 1493"] Basically ring gaps should be set by the manufacturer, but then, I once had a brand new Mahle auto piston taken from the original packing. When trying to slip the cylinder over it It stopped at the oil control ring and even a lot of push would not get the piston inside. So in the end I stopped trying and inspected the ring, had a nasty scratch in the cylinder bore from trying. Obviously that ring was for the next oversize when I took measures !! In our case would a too small ring gap produce nip ups on the piston skirt like shown ?? I would not think so. How is the fit of the cylinder liner in the crank case ? An easy slip fit with not the least resistance when shoving down ?? Otherwise I´d suspect a deformed liner from an imperfect case, less so from head studs. Vic [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Nip up Comet
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