hi guys iv just put my sherco 250 2004 back together after having the crank bearings replaced,.iv just fired it up for first time.sweet as rolls royce..only the crank case breater pipe drips oil,,im assuming this isnt good..any ideas?..

Probably just some oil sitting in the breather cavity from the rebuild, run it for a while if everything feels okay & see if stops leaking.

The only reason it will drip normally will be from a air leak from the crank as there is no other way for the gearbox to pressurize, the motor will run noticeably different if this is the case & may smoke more if the leak is from the crank seal

its had new seals fitted..if it was leaking pressure into clutch/gear box area..how would it run..coz it runs sweet now..dare i run it t see if it stops dripping.

Put a length of clear PVC pipe on you breather and put the end under the surface in a jar of oil. You should see bubbles as the bike warms up and the gearbox oil and air expands.If the bubbles continue once the bike is warmed up you probably have the crankcase leaking into the gearbox. Depending on the rate and amount of bubbles you can judge how serious the problem is. It could be pressure from the crankcase but if the gearbox oil starts to turn milky the pressure could be from the cooling system.

Edited May 18, 201412 yr by dadof2

Or you put too much init! They will find their own level if you ran it hard .