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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oil consumption
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<blockquote data-quote="davidd" data-source="post: 133033" data-attributes="member: 1177"><p>I now remember Neville's article, but not enough to discuss it. I put locking rocker feed bolts in David Tomkins' engine and he drilled out the oil holes. I remember checking Neville's article at that time. David runs the thinnest oil he can and it has worked well for him with no oiling issues. I can only say that the engine has good drainage and no leaks.</p><p></p><p>It is a little work, but I wonder if you could check the output of oil as Greg suggests and run the same test with the output of oil at the return. It could be timed and run at a similar rpm to see if there is a large amount of oil difference. It would tell you if there something to worry about. But I am not certain that the problems you are experiencing are not just a number of known, but small issues like breather timing or routing the tube vertically, locking rocker feed bolts, guide drainage, leakdown problems, etc.</p><p></p><p>Sometimes the cases have damaged scrapers or holes drilled through the bottom of the scrapers, which can alter the normal flow and scavenging of the engine.</p><p></p><p>David</p></blockquote><p></p>
[QUOTE="davidd, post: 133033, member: 1177"] I now remember Neville's article, but not enough to discuss it. I put locking rocker feed bolts in David Tomkins' engine and he drilled out the oil holes. I remember checking Neville's article at that time. David runs the thinnest oil he can and it has worked well for him with no oiling issues. I can only say that the engine has good drainage and no leaks. It is a little work, but I wonder if you could check the output of oil as Greg suggests and run the same test with the output of oil at the return. It could be timed and run at a similar rpm to see if there is a large amount of oil difference. It would tell you if there something to worry about. But I am not certain that the problems you are experiencing are not just a number of known, but small issues like breather timing or routing the tube vertically, locking rocker feed bolts, guide drainage, leakdown problems, etc. Sometimes the cases have damaged scrapers or holes drilled through the bottom of the scrapers, which can alter the normal flow and scavenging of the engine. David [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oil consumption
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