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Enduro Engine - 2 stroke Cylinder, Piston, Tranny, Bearings, Clutch, Pipes & Silencers, etc.

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Old 01-07-2024, 08:20 PM
coble coble is offline
Join Date: Oct 2020
Posts: 7
Default 2018 ex 300 power valve

Hey guys! I had my 2018 ec 300 rebuilt and ever since then my tranny oil gets black extremely quik. It seems to me it leaks down from the power valve rod in to the clutch side and Dirty?s the oil. Are there not any seals on the power valve to keep it from doing this?

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Old 01-08-2024, 01:19 AM
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(F5) (F5) is offline
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Location: Wellington New Zealand
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Thats common in all architecture.

I'd suspect clutch plates. Could they be aftermarket or just trashed and slipping.
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Old 01-08-2024, 10:18 AM
BrandonEc300 BrandonEc300 is offline
Join Date: May 2020
Location: West Milford NJ
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You likely didnt use a sealed or shielded bearing. You don?t want exhaust gases to flow inside the right side pv cover
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