Connor
I thought we were talking 2 stroke woods bikes-I dont know why one would need to hold it WFO for 10 minutes straight, but then again mybe I'm not seeing the hole picture.
There should be no oil buid up-the oil mixed with the fuel to make premix is to lube the crank and top end and any that is left should go out the exhust.
But on some 4 strokes it could if held WFO for 10 minutes pump oil into the vavle box faster that it can drain back to the bottom.
*L* but what do I know?
TxTom
#04v
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Rolling Thunder Racing.
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Tom
#04v
Honda XR200