10 port 70cc cyl Yamaha /Min.

OK for racing! Comes with bowl chamber / squish head. Suits Yamaha or Minarelli type horizontal engine, increases capacity to 70cc for more torque and power. Features: 10 port cylinder for huge port-time area Coated alloy piston, twin ports new pin and clips, gaskets Computer designed head with squish area and bowl combustion chamber For newer Jogs with emissions control, you will need to fit an exhaust from a non-emissions Jog. This should fit clones like Minarelli engines, Chinese 2 strokes (FYM Urban, CPI Hussar, CMG etc) Uses 10mm gudgeon pin.   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 increases engine size so that your bike may not be legally registered as a moped in NZ.