I heres what I have. It is a 2000 Yz 125. It did have a oversized 136 kit in it. I fried the piston and decisede to go back to stock. I put a new sleeve in a and bought a wiseco piston. So today I went to put it togther. It seems as theough i have a hot rod also. So i tried to use the old wristpin bearing with the new wiseco wrist pin. The old wristpin bearing is way to big for the new wisco pin. It seems as though the old wrist pin, bearing and con rod hole is bigger. So, heres what i am thinking- The wrong rod is in it. Maybe I need another bigger bearing? Anybody have this problem? The old piston I had in it fit. But i dont have the piston and i dont remember what brand it was. I need some real help! please! These rod are common but maybe the wrong one is in it. The neumber on the rod is C.K 104 Help please!