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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oil loss through breather pipe
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<blockquote data-quote="John Appleton" data-source="post: 16514" data-attributes="member: 760"><p>Hi Tony, the breather is not available as a spare, but is of our own design and manufacture for our own use, but I am sure you will know of somebody to make you one locally. It is normal for the standard breather to be straight through as there is a sleeve valve timing device within the timing chest. This is designed to close 30 degrees after bottom dead centre of the rear cylinder, so there should be no likelyhood of dirty air being drawn in as the pistons rise, but you are quite correct in saying that a purely atmospheric breather would be a bad idea for this very reason.</p><p> From all that you have said it sounds as if you have a perfectly standard breather set up on your bike.</p><p> John</p></blockquote><p></p>
[QUOTE="John Appleton, post: 16514, member: 760"] Hi Tony, the breather is not available as a spare, but is of our own design and manufacture for our own use, but I am sure you will know of somebody to make you one locally. It is normal for the standard breather to be straight through as there is a sleeve valve timing device within the timing chest. This is designed to close 30 degrees after bottom dead centre of the rear cylinder, so there should be no likelyhood of dirty air being drawn in as the pistons rise, but you are quite correct in saying that a purely atmospheric breather would be a bad idea for this very reason. From all that you have said it sounds as if you have a perfectly standard breather set up on your bike. John [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oil loss through breather pipe
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