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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet Blowing Out Blue Smoke after running slowly
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<blockquote data-quote="timetraveller" data-source="post: 27560" data-attributes="member: 456"><p>It's safe to blank it off but it might not be working anyway. You write that you drilled at an angle. There is a significant height difference between the feed at the rear of the liner in the crankcase and the height of the scraper ring. Normally a slot is milled into the rear of the liner. An angled drilling is not likely to have done it. Did you check the clearance of the piston skirt in the liner with a feeler guage at several places? Clearance should be about 3 to 3.5 thou. If not then you might have put a new piston into a worn or oversized liner.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 27560, member: 456"] It's safe to blank it off but it might not be working anyway. You write that you drilled at an angle. There is a significant height difference between the feed at the rear of the liner in the crankcase and the height of the scraper ring. Normally a slot is milled into the rear of the liner. An angled drilling is not likely to have done it. Did you check the clearance of the piston skirt in the liner with a feeler guage at several places? Clearance should be about 3 to 3.5 thou. If not then you might have put a new piston into a worn or oversized liner. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet Blowing Out Blue Smoke after running slowly
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