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Thread: Primary Oil
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Old 04-08-2008   #26 (permalink)
Woolly
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Supersport 400
 
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Join Date: Nov 2007
Location: Co. Durham, UK
Posts: 87
Quote:
Originally Posted by GrandPaulZ View Post
You likely have a seal fitten on the crank.

What breather setup are you using?

Are you experiencing significant oil weepage at some gasket joints?
When I rebuilt the bottom end, I put a non-sealed drive side crank bearing in, and use the standard breather system out of the top rear of the primary case. It still amazes me at how little oil gathers in the primary case - I figure the scavenge side of the oil pump is working (too?) well - also no oil leaks - I can't use the old 'when it stops dripping, it's run out' sign anymore. To be fair, I spent about 4 months rebuilding the engine (on and off), Merriden used to knock out a few hundred(?) per day - I could spent a bit of time on mine obviating leaks etc..
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