Ok i got lazy the last time i changed the oil on my quad and never used a torque wrench to tighten the oil drain plug on the crank case. any way i over tightened it. and when i took out the bolt yasterday it took out all the threads. so i lied to the yamaha dealer and said that i used a torque wrench and there gona re thread it and fix it for free. so a lesson learned for free.