The best selling X30 is the most successful blend of innovation and tradition. Offering modern features such as an electric starter, balancer shaft and water-cooling, while preserving traditional specifications that include the diaphragm carburetor and the absence of the power valve. The result: an engine that is fun to drive, easy to use and long lasting. Pure karting! Model: 30 125cc Junior – Spec- UK/USA Description: Single cylinder – 2 stroke Class: 125cc Stock Class Bore: Ø 54,00mm Max-Bore: Ø 54,28mm Stroke: 54,00mm Displacement: 123,67cc Ports: 3 Inlet-System: Reed Valve Lubrication: Oil mixture Ignition-System: Digital Transmission: Centrifugal Dry Clutch Cooling-System: Water Balancer-Shaft: Present Starter: Electric Carb-Model: Tillotson HW-27A Max-Power: 21 Hp Max-Torque: 11 Nm Max-RPM-Limit: 16.000 RP