OK for racing!
Cast iron body for stability and strength
Advanced port map for high power at all RPM
Custom head with computer designed squish area and bowl shape
Excellent construction and nice finish
Recommended for sports or street use. Good durability for street use too.
To suit horizontal 2 stroke engines in the Yamaha / Minarelli style with 12mm gudgeon pin. Includes many Keeway (Focus, Matrix), CPI (Hussar, SS50 etc), CMG, Vmoto Monza and all Urban / Urban R4 engines. 12mm gudgeon pin. Note that this exhaust outlet faces downward and slightly rearward. For scooters with ports angled slightly off to one side, the exhaust mount or flange may need to be modified a little.
This kit must be fitted and the carb tuned by a technician or skilled person. Piston seizure is a symptom of poor carb tuning and claims regarding these kinds of problems will not be accepted. This kit increases engine size to 70cc so your bike may not be legally registered as a moped in NZ.