【Specifications】Big bore cylinder diameter: 57.4mm/2.25", piston diameter: 57.4mm/2.25", piston pin diameter: 15mm/0.59", piston pin length: 42mm/1.65". Other dimensions are marked in the figure. Please check it before order
【Power Into Overdrive】Choose mod parts you can trust. This big bore kit for 125cc scooter's piston rings are made from alloy while the piston is made from aluminum. The cylinder is crafted from strong steel
【Built To Last】The ignition coil is made of high voltage material skeleton structure, durable. Strong high and low speed ignition performance, fast acceleration and fuel saving
【Complete Kit】Install the gy6 big bore cylinder kit set easily with the included accessories: GY6-150cc cylinder set + lever head with valve + oil pump assembly+ rocker arm + 1 set of 50mm piston assy, piston, rings and wrist pin + 14 grams of roller weights + 1 full set of engine gaskets + upgraded racing ignition coil + upgraded racing CDI + 2 racing spark plugs A7