YZ50 and "OW" Kit

Direct bolt on to YSR50

all items are new in box and have not been available for 30 years!

The OW Kit was a Japan only item it uses YZ 60 Piston

OW Kit contains piston, rings, pin, and gaskets. Cylinder must be bored to accept the 60CC piston, or you can use YSR stock Pistons on the stock YZ50 Cylinder

$375

Daytona Aluminum Big Bore YSR Cylinder and Head

No Longer Available

44.5 MM Big Bore

$225

Sleeve for YSR Cylinder

$ 25 

 Used YSR Cylinders

40mm Cylinders (standard bore) new from Yamaha are $303.97