what could have caused this?

[kawi636braaap]

Originally Posted by old man roger

Looks like some one didn't do the clean air mod.


''If'' you have oil in your air box then you probably pumped oil from your crankcase vent tube into your cylinder.

This will cause the motor to hydro lock ..Oil doesn't compress so the connecting rod did.

Another reason could be that you blew a head gasket and filled a cylinder with coolant, coolant doesn't compress so the connecting rod did.

To my knowledge the clean air mod would only matter when the bike is near verticle and the oil can make its way through the airbox. Obviously during a burnout its not verticle and the oil should be circulating normally. If it hydrolocked its because of something else, maybe the oil seals are leaking on the valve guides or coolant from a blown headgasket. Maybe the oil pump went and you lost lubrication and the heat from friction blew the hole. Hard to say unless you rip down the motor.Does it still turn over?