Yamaha Vertical Minarelli Stage6 Streetrace 40mm 50cc Cylinder Kit aprilia Original Tomos part number 233

Original Tomos part number 233

Some may have a little color on the crank web but are still perfectly usable

this is likely the one you need

Special note- these only come with what is pictured

The side covers are in good shape but one of the push mounts is gone

Yamaha Vertical Minarelli Stage6 Streetrace 40mm 50cc Cylinder Kit aprilia Original Tomos part number 233Stage6 Streetrace 40mm 50cc cylinder kit for Vertical Minarelli scooter engines. These were commonly found on early pre bug type Yamaha Zuma, BW'S, MBK Booster, etc. Very nice looking cast iron kit. Stage6 claims these are good for 7 or so horsepower when paired with a 17mm carburetor and sport touring type exhaust. 2 ring piston with stock style 10mm wrist pin. Comes with cylinder, piston, rings, pin clips, head, base gasket and o ring for head.