- Sep 5, 2023
- Reaction score
Can I use the top end of a 125cc motor " TZH157FMI" On my 50cc motor " 139FM-2 (D)" bottom end? It has the four-speed transmission in it. I've already tried putting the top end on and achieved it. But I didn't use the 125cc piston rod. The 125cc transmission is an automatic. That is why I have this question. Because I need to use one side of the case I have stripped out the head bolts. Well they were stripped out when I got the bike. Thank you for your help.