Hello I work at a kawi dealer as the parts manager. I had a customer bring in his 13 kx250f motor to our service department yesterday. His oil seal inside his motor on the clutch side was torn. So the motor was not getting enough oil, which caused his exhaust valves to bend which destroyed the motor. He was thinking that it was a defect from the factory since how would that seal get torn when there's nothing that could have torn it from inside the motor. He said he did some research and found out that this was pretty common on the 13-14 kx 250f. I have a 2014 kx 250f and was wondering if anyone out there has heard of this happening. If so I'm going to buy a gasket and take my cover off to check the seal in my motor to make sure is isn't torn.