Originally Posted by Rsickles

Arrow Racing is made by GO Engines in Taiwan at their Taichung factory.
Bullit Engines is made by OS Engines in Japan at their Nara plant.


XZ = Long stroke
VZ = Short stroke

Arrow is based on the short stroke VZ. The engine is a clone of the VZ-B V-Spec. It doesn't share anything with the VZ-B Speed, except for the fact it was designed with that style bottom end lubrication (the oiling hole was moved from the crank pin onto the rod to increase lifespan).

Bullit engines are based on the long stroke XZ engines. The 216 is essentially a XZ-B V-Spec while the 218 is essentially a XZ-B Speed.


Everything fits in a VZ-B.

The only thing that fits on a XZ-B is con rod, wrist pin clips, front and rear bearings, carb retainer, backplate screws, and the entire carb (just switch whole thing, I wouldn't mess with mixing Arrow carb parts with OS ones). That's it.

Crankcase, backplate, crank, piston, sleeve, head button, head gaskets, cooling head, and head bolts are all different.