clutch cover breather leak
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Enthusiast
1x VNA1T, 1x GS200
Joined: 16 Jun 2015
Posts: 85
Location: Brisbane, QLD
Thu Jul 30, 2020 1:11 am quote
just finished building a new performance engine and have got oil leaking out of the clutch cover breather. it's not just a little, it's enough to trickle down and hit the brake backing plate within minutes. so it's an S&S cover thats been milled out and an MMW basket, nothing unusual. gearbox oil level is also correct. anyone else had to deal with this issue?

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Style Maven
74 50s x3 78 P200 84 Cosa PK50XL2 58 AllState 68 Sprint 80 50special '66(?) Super125
Joined: 22 Nov 2010
Posts: 7799
Location: seattle/athens
Thu Jul 30, 2020 7:39 am quote
The only thing that occurs to me is that somehow you are getting pressure building up in your gearbox. Clutchside seal?
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2226
Location: London UK
Thu Jul 30, 2020 9:10 am quote
+1
If a new seal, the bad news is it might have fell out. Pressure test before starting again.
Enthusiast
1x VNA1T, 1x GS200
Joined: 16 Jun 2015
Posts: 85
Location: Brisbane, QLD
Thu Jul 30, 2020 10:39 am quote
hmmm, bum. okay... if it was the clutch side seal, it would be sucking and burning gearbox oil too yeah?
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