What top end will fit on the ATC70? I was told that either the 125 or 110 will fit. Does anybody have any experience in this area????

Any help would be greatly appreciated. My pit bike isn't custom enough yet.

 

i know the 110 will fit cause i have done it before but then i blew it up becaue i put somthing back to gether wrong and it didnt get any oil in teh top end. i am not sure about a 125 but i dont see why it woudnt. good luck

 

The 110 topend will NOT fit the 70 bottom end. Wrong piston pin size(13mm for the 70 and 15mm for the 110), wrong size studs (6mm for the 70 and 8mm for the 110), wrong stud pattern, wrong cam chain allignment, wrong case bore size,everything is wrong. Depending on the model 70, you can fit the whole 110 or 125 engine into the 70 frame in about 10 minutes.