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Bike as 25000 miles and only 1500 on a topend.It sat for 6mo and when started runs great but pukes oil from crankcase into the breather.Anyone know what is wrong.
 

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your motor is sumping, or allowing extra oil into the crankcase as it sits. It is common
enough and a search should find on of the previous threads on the subject.
What is needed is to reseat the check ball in the tappet screen.
 

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Like Fxr says, it's pretty common..

It happens to me once in awhile if, after swapping motors, I let a motor sit a wee too long before slipping it in to another sickle..
Doesn't occur every time however..

After it is done pumping out the oil that seeped past the check-ball it will usually not do it anymore..
Don't need to re-seat anything, it'll re-seat all by itself..

The next time it sits for a looong time it may Not do it..
It simply doesn't happen every time..

Soo, you know,, the next time it might seal up perfect and there'll be No sumping,, luck a the draw..
 
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