BSA Owners' Club Forum
The BSA Workshop => Twins => Topic started by: malzstx on 17 August, 2017, 17:24:45
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Can anyone tell me why I am getting drips of oil from the breather when the engine is running on my Super Rocket?.....thanks.
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If it is a lot then could be any of these;
Breather not properly assembled - wrong thickness cork.
Excess crankcase pressure caused by worn rings/bore/guides, rings not bedded in, poor scavenging of oil from sump.
But expect a little after a good hard run.
If bike wet sumps then it will blow oil until excess cleared.
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i would also add a loose oil pump or blockage in the return flow or p r valve not seating to that list, too much oil in the sump. but the favorite is a worn out cork breather gasket.
what does the oil return in the oil tank look like when the engine expels oil from the breather?
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Thanks so much for the reply......the return is flowing excellent back to the tank and the engine has been re-built professionally. Giving it some thought, it may be the residual oil in the engine dropping into the sump when the engine has stopped ???
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Furthermore I have since fitted a 'Ballafix' quarter turn tap on the flow to prevent wet sumping when standing and I'll see how that goes. Many thanks to you Julian & Eddie guys.