A high performance cylinder for the px series 200cc motors. This cylinder has been cast in Aliminium to help with heat dissapation and to save a bit of weight. The ports on the sleeve are much larger than standard and require some modification on the engine casings to achieve maximum performance gains. The piston is also lighter with larger ports to allow for maximum flow. Thinner rings allow for less drag, while an L-shaped top ring helps keep the compression up. The cylinder head also has additional fins to help dissapate the heat quicker. Overall, this kit gives a 200cc motor a lot more power throughout the rev range.