I have an 01 ds stock motor with pipe and carb and everything runs fine but there is a small leak up near the starter. It usually doesnt start leaking unless I have been riding for a while or have been drag racing.
whats wrong?

 

There's an '0' ring up there where the nipple of the starter goes into the motor. I suggest trying to find a new '0' ring that fits before the nipple wears out a larger whole there. Once it does, then you'll have to consider ways to fill in the larger hole.