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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Poorish compression and piston leak by
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<blockquote data-quote="timetraveller" data-source="post: 43109" data-attributes="member: 456"><p>I do wonder whether keeping the speed down to 40 for 600 miles might not have caused some slogging of the engine which is what I was always tought to avoid whilst running in, rather than too many revs. Having said that I do not see how slogging could have caused the liner to be scored. Before going too far is it possible to insert some really thick oil through the plug hole, turn the engine over a few times to try and get the oil all round the piston top and rings and then do the compression test again? It might just give you some idea as to how bad the leak is and as to whether more high speed running in might wear down some of the scoring. Good luck with it. A thousand miles is just not acceptable and suggests something more than normal airborne grit. ? winter salt and sand off the roads.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 43109, member: 456"] I do wonder whether keeping the speed down to 40 for 600 miles might not have caused some slogging of the engine which is what I was always tought to avoid whilst running in, rather than too many revs. Having said that I do not see how slogging could have caused the liner to be scored. Before going too far is it possible to insert some really thick oil through the plug hole, turn the engine over a few times to try and get the oil all round the piston top and rings and then do the compression test again? It might just give you some idea as to how bad the leak is and as to whether more high speed running in might wear down some of the scoring. Good luck with it. A thousand miles is just not acceptable and suggests something more than normal airborne grit. ? winter salt and sand off the roads. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Poorish compression and piston leak by
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