Upgrade your bike! ENGINE ONLY- not a full kit.

-Upgraded crank bearings.

-Trued crank- lower vibration. 

-Better quality piston.

-Comes with 8mm grade 8 mounting bolts.

-Hand ported cylinder for more power.

Engine only- ported cylinder, copper head gasket, OZ magneto (bigger with more windings, stronger spark.
 
Fantastic relaible performance motor. Need something super reliable and low-cost but want more power than a stock motor? This is for you.

Cylinder needs to be assembled on engine- instructions included- takes 15 minutes to assemble. Piston preinstalled.

Big upgrade vs. cheaper junk engines.