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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet Breathers
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<blockquote data-quote="Holger" data-source="post: 45012" data-attributes="member: 2894"><p>There is a better way of doing this which is a simple one way reed valve which is used on many motorcycles. You can get a cheap item to suit the Yamaha XS650 or pay more for a MG Le Mans 1000cc item. The reed valve would work perfectly with the elephant's trunk and hold the crankcases in vacuum while the engine is running.</p><p></p><p>I've had one fitted to my 850 Commando which works brilliantly and the machine is now 100% oil tight (No Kidding! Hand on Heart! I have witnesses! Honest!).</p><p></p><p>As part of the TPV 1200cc top end conversion on my Rapide which is nearly complete I have had the standard breather outlet bored straight through into the crankcase and fitted a full bore pipe fitting outlet. From there it will be a pipe and hose up an over the top with a reed valve located near the battery. This should work very effectively and hopefully be little more discrete than the elephant's trunk.</p><p></p><p>Holger</p></blockquote><p></p>
[QUOTE="Holger, post: 45012, member: 2894"] There is a better way of doing this which is a simple one way reed valve which is used on many motorcycles. You can get a cheap item to suit the Yamaha XS650 or pay more for a MG Le Mans 1000cc item. The reed valve would work perfectly with the elephant's trunk and hold the crankcases in vacuum while the engine is running. I've had one fitted to my 850 Commando which works brilliantly and the machine is now 100% oil tight (No Kidding! Hand on Heart! I have witnesses! Honest!). As part of the TPV 1200cc top end conversion on my Rapide which is nearly complete I have had the standard breather outlet bored straight through into the crankcase and fitted a full bore pipe fitting outlet. From there it will be a pipe and hose up an over the top with a reed valve located near the battery. This should work very effectively and hopefully be little more discrete than the elephant's trunk. Holger [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Comet Breathers
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