125 Yamaha


Looking at what the owner claims is a 125. Looks just like the KT100, did they make a 125. It has TMF on the side of the head.

Yamaha made several 100cc engines for karts rotary valve and I think reed plus a 135cc engine rotary valve back in the 80's. All pretty rare.
I made a 131, but never ran it, just put the crank back in my TT-25. I met a guy from Cal. who worked in a N.C. Kart shop who also had one, he said it ran great until there were no more big pistons available.