hey a mate has one of them ducat 125 snotters it locks up in third gear but the out put shaft pushes in and out excessivly i have the motor apart and was wondering if any one knew if there is supposed to be a washer of some sort on the end of the output shaft side of the gear box were it sits into the other crankcase because on the end gear you can see were it has just been running straight on the bearing ?