last night, i tried to replace the oil drain screw with a new one i bought from Bikebandit, and when i was putting the new one in, it didnt tighten all the way, so i took it out and took a look inside, turns out that the threads on the engine case are chipped...i know they sell these little bushings that you put on the threads to fix the problem, but i dont know if they will hold with all of the engine vibrations and jumps...any suggestions?