FNG241_WR450F I hope you have better luck with #418. I have #413, of course, it's still clean since it failed in the parking lot. The rotor nut was checked, the carb jetted richer before starting it. Then they even lapped it before it was ridden all to no avail, the key sheared with less than a mile on it. Yamaha is replacing the crank and rotor, the crank is in, the rotor well, 67 on back order, 38 in transit who knows when we'll see one, glad we didn't sell the KTM.