Big bore kit alloy Honda horizontal 2T

OK for racing! This kit features a nicasil lined, alloy cylinder and coated piston for good heat shifting and ultra low friction. As used on many competitive track and street Hondas. The main exhaust port is much larger than the standard one, increasing effective port timing. The transfers and boost port are designed with charge velocity in mind, packing the bigger cylinder fuller for more power development. High performance and good longevity. Depending on the model, some may need additional base gaskets or pinging can occur from high compression. Suits 50cc Honda scooters with horizontal engines, including: Dio AF34, AF35 (all, including SR, ZX etc) Topic AF38 Daelim E-Five and S-Five (needs exhaust flange turned a little to match) Increases capacity to 70cc for more torque and power. Comes with big port cylinder, alloy piston, rings, new pin and clips, gaskets, high fin alloy head with bowl chamber. NOTE if your bike has the later model emissions-control exhaust with external catalytic converter you should change to a pre-emissions exhaust. 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