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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Breathers, can anyone help.
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<blockquote data-quote="John Jones" data-source="post: 56695" data-attributes="member: 1150"><p>I have a lovely Norvin with a standard spec Rapide engine finished in black.</p><p>After a particularly hard ride over the mountain on the IOM with Glen English on my tail, on a Commando, (with his wife on pillion),the poor 66 year old motor started to weep.</p><p>Nothing from the top end, just from a few secret places hidden under the engine. Very difficult to source as the motors painted black but I have a strong suspicion it could be from the vertical crankcase joint.</p><p>I have only 1 breather on the rear inlet valve cap and the standard timed engine breather.</p><p>After all the years of research and prototyping of breather solutions for this kind of problem there must be an agreed "industry standard" remedy but for the life of me I can't find it on the web.</p><p>There seems to be multiple solutions suggested ranging from moving the breather pinion 2 teeth to fitting elephant trunks to the points cover.</p><p></p><p>Does anyone have a tried and tested solution or should I just rebuild the engine in standard trim and hope for the best?</p><p></p><p>John.</p></blockquote><p></p>
[QUOTE="John Jones, post: 56695, member: 1150"] I have a lovely Norvin with a standard spec Rapide engine finished in black. After a particularly hard ride over the mountain on the IOM with Glen English on my tail, on a Commando, (with his wife on pillion),the poor 66 year old motor started to weep. Nothing from the top end, just from a few secret places hidden under the engine. Very difficult to source as the motors painted black but I have a strong suspicion it could be from the vertical crankcase joint. I have only 1 breather on the rear inlet valve cap and the standard timed engine breather. After all the years of research and prototyping of breather solutions for this kind of problem there must be an agreed "industry standard" remedy but for the life of me I can't find it on the web. There seems to be multiple solutions suggested ranging from moving the breather pinion 2 teeth to fitting elephant trunks to the points cover. Does anyone have a tried and tested solution or should I just rebuild the engine in standard trim and hope for the best? John. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Breathers, can anyone help.
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