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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oil loss through breather pipe
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<blockquote data-quote="ernie" data-source="post: 16636" data-attributes="member: 63"><p>Hi Tony, kif inti?</p><p></p><p>You started such a fascinating thread. It has excited me so much I am moved, uncharacteristically, to add my £200 worth.</p><p></p><p>First off, the standard breather on a Vincent twin is generally accepted as adequate for a normal road-going machine in good fettle. However it is also known that at tickover it will drip oil. So your breather is working normally in my opinion. The breather can be overwhelmed if there is too much blow-by past the piston rings because, as I believe to be in your case, they have not yet bedded in. 500 miles would be adequate if you ran in properly, giving it a few good squirts, up to half throttle, to force the rings against the bores. If one poodles around, it will take longer. But even when bedded in, the breather will still drip at tickover. This is simply because the timed breather valve inside the timing cover is located in a particularly oily place.</p><p></p><p>There are many many solutions to this problem. You can use a catch bottle. You can fit another breather and there are many many ways of doing this. Everyone has their favourite method and swears by it to the exclusion of all others. Tom Gaynor has his. The Appleton layer have theirs and there are many more. I have mine but I will not burden the list with a description now, unless there is a chorus of encouragement... hello... hello... curious silence. </p><p></p><p>Forget the metering wires issue. It is only significant if you suffer from a chronically smokey exhaust or oiling plugs.</p><p></p><p>Forget the 2 start pump worm issue. The standard one is perfectly adequate and you really do not want to go there.</p><p></p><p>I hope that helps. I look forward to meeting you somewhere on our bikes.</p><p></p><p>Best regards and warm encouragement from</p><p></p><p>Ernie Lowinger</p><p>born in Malta G.C. 11 My 1942</p></blockquote><p></p>
[QUOTE="ernie, post: 16636, member: 63"] Hi Tony, kif inti? You started such a fascinating thread. It has excited me so much I am moved, uncharacteristically, to add my £200 worth. First off, the standard breather on a Vincent twin is generally accepted as adequate for a normal road-going machine in good fettle. However it is also known that at tickover it will drip oil. So your breather is working normally in my opinion. The breather can be overwhelmed if there is too much blow-by past the piston rings because, as I believe to be in your case, they have not yet bedded in. 500 miles would be adequate if you ran in properly, giving it a few good squirts, up to half throttle, to force the rings against the bores. If one poodles around, it will take longer. But even when bedded in, the breather will still drip at tickover. This is simply because the timed breather valve inside the timing cover is located in a particularly oily place. There are many many solutions to this problem. You can use a catch bottle. You can fit another breather and there are many many ways of doing this. Everyone has their favourite method and swears by it to the exclusion of all others. Tom Gaynor has his. The Appleton layer have theirs and there are many more. I have mine but I will not burden the list with a description now, unless there is a chorus of encouragement... hello... hello... curious silence. Forget the metering wires issue. It is only significant if you suffer from a chronically smokey exhaust or oiling plugs. Forget the 2 start pump worm issue. The standard one is perfectly adequate and you really do not want to go there. I hope that helps. I look forward to meeting you somewhere on our bikes. Best regards and warm encouragement from Ernie Lowinger born in Malta G.C. 11 My 1942 [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oil loss through breather pipe
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