Also, while I have y’all guys here. What causes a ridiculous amount of carbon build up? Or oil to be all over everything. I have a yz 250f with around 75 hours on motor total and 24 on top end. Went into the top end tonight to rebuild it and there is like black oil slung everywhere. Covered all my cylinder ports, inside of cylinder (obviously), under my piston, everywhere inside. I did the other top end around 25 hours and it was nothing like this. Use only stock pistons and rings. Have a
I didn’t read up and I just found. I looked under transmission but I was looking for a sprocket and that thing is like a 3 toothed sprocket. They messed me up.
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