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Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Troubleshooting (Poor Starting/Running/Handling/Ride Issues) » 1997 m2 cyclone is puking oil through the carburetter mouth « Previous Next »

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Dorset
Posted on Sunday, July 07, 2024 - 05:31 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

hey folks

took my old cyclone out today to teach the son how to ride. on the way home on the I-state, about 60 mph, it started to smoke. i was behind and was getting oil on my visor. then the smoke got serious and i passed the boy up and waved him to the shoulder.

the buell was trickling oil out of the carburetter mouth. a serious puke onto the exhaust, whjich was where the smoke was coming from. oil on the ground, oil all over the left side of the bike, oil dripping steadily out the mouth of the carb.

there is no oil in the exhaust pipe-- just normal dry soot.

got in late so i havent so much as taken the tank off to look at the top end, or put a meter on it to check the compression. but looking at the manual's two-color oil diagram, i can see no obvious way for a continuous stream of oil to make its way to the carb mouth while the tailpipe is dry.

but the PCV system, perhaps? thats the only way i can see oil coming from the rocker boxes into the intake. but why the sudden flow? is something blocked?

i am more familiar with old british machinery, but this buell has always been my go-to machine for reliability.
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Dorset
Posted on Sunday, July 07, 2024 - 05:33 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

right side of the bike, sorry.

what would suddenly pressurize the crankcase to flood the top end?

compression test is indicated, it seems

(Message edited by dorset on July 08, 2024)
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Ocbueller
Posted on Monday, July 08, 2024 - 08:44 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Check your primary oil level. Blown crank seal could be pushing primary oil into crankcase.
SteveH
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Ocbueller
Posted on Monday, July 08, 2024 - 09:16 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Or do I have that ass backwards and the oil would fill the primary?
SteveH
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