We highly recommend pairing this with a 46mm High-Flow Clip-on Air Filter to realize the full horsepower gains
Directions for Use: Combine 2 sets of rollers in an alternating pattern
Spline Count: 19-spline backing / 16-spline drive face
SKU: 159-28
Length 113mm / 4
Universal Parts Minarelli 47mm Big Bore Cylinder Kit jmstar We highly recommend pairing thisBump your Minarelli powered 50cc scooter up to 68cc with the Universal Parts 47mm Big Bore Cylinder Kit. Designed for the horizontal 1PE40QMB Jog style engine, this complete kit includes everything needed for the swap cylinder, piston, pin, rings, circlips, head gasket, and base gasket. Key Features Upgrades displacement from 50cc to 68cc (based on stock 39. 2mm stroke) Complete kit cylinder, piston, 12mm pin, circlips, rings, head gasket, and base