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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Additional or alternative engine breather
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<blockquote data-quote="Tom Gaynor" data-source="post: 14192" data-attributes="member: 4034"><p>Singles (of any make) aren't a problem. The ideal is to have a breather input as close to the crank axis as possible, then a PCV, and, then, maybe, a pipe to a catch bottle. The catch bottle is there so you caN MONITOR HOW MUCH OIL IS BEING DUMPED. f*CK IT, caps lock accidentally hit again.</p><p>Unless you want to drill new holes, use the existing Comet breather input, a pipe, as large a bore and as short as feasible leading up, a PCV, and an exhaust leading to the bottle, which, if it remains empty, can be eliminated. If not, read on..</p><p>In my not normally noticeably humble opinion (a man of strong opinions, weakly held...) the perfect system is the Manx Norton / Matchless G50 system. The DS mainshaft is hollow. At the outer end is a flap (OK, PC) valve. No oil exits because oil is centrifuged away from the crank axis. There isn't so much as an oil STAIN on the fairing, after 15 seasons. </p><p>My Rudge, like a Vincent but more powerful, has such a system. The input is about 2" from the crank axis. There may be other Rudges that don't piss (sorry, I meant p*ss) oil from every joint, but I haven't seen them. Mine does not. Implicit in this is that your Comet breather INPUT becomes one of the rocker caps, or the front (exhaust) valve cap. (Plug the timed breather).</p><p>Got any pictures of the Rumi? Seen them in a (Maserati) museum near Modena. Heart-breakingly elegant.</p><p></p><p>Tom</p></blockquote><p></p>
[QUOTE="Tom Gaynor, post: 14192, member: 4034"] Singles (of any make) aren't a problem. The ideal is to have a breather input as close to the crank axis as possible, then a PCV, and, then, maybe, a pipe to a catch bottle. The catch bottle is there so you caN MONITOR HOW MUCH OIL IS BEING DUMPED. f*CK IT, caps lock accidentally hit again. Unless you want to drill new holes, use the existing Comet breather input, a pipe, as large a bore and as short as feasible leading up, a PCV, and an exhaust leading to the bottle, which, if it remains empty, can be eliminated. If not, read on.. In my not normally noticeably humble opinion (a man of strong opinions, weakly held...) the perfect system is the Manx Norton / Matchless G50 system. The DS mainshaft is hollow. At the outer end is a flap (OK, PC) valve. No oil exits because oil is centrifuged away from the crank axis. There isn't so much as an oil STAIN on the fairing, after 15 seasons. My Rudge, like a Vincent but more powerful, has such a system. The input is about 2" from the crank axis. There may be other Rudges that don't piss (sorry, I meant p*ss) oil from every joint, but I haven't seen them. Mine does not. Implicit in this is that your Comet breather INPUT becomes one of the rocker caps, or the front (exhaust) valve cap. (Plug the timed breather). Got any pictures of the Rumi? Seen them in a (Maserati) museum near Modena. Heart-breakingly elegant. Tom [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Additional or alternative engine breather
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