ITEM DESCRIPTION: Cylinder Kit for Lifan 125cc engines with 52.4mm bore 55mm stroke 13mm wrist pin (see info and specs below). NOTE: This engine is different than a Honda Clone but looks very similar. It has a cast iron cylinder with 52.4mm bore like 110cc engines but it has a longer 55mm stroke making it 125cc. You must verify it says 124cm3 on one of the fins (if yours says 107cm3 this is not the one for you). Also verify your cylinder is 78.5mm tall (this one is taller than other 125cc cylinders to accommodate the longer stroke). Lastly, compare carefully to my pictures and dimensions to be sure it is identical (this is an OEM part, it must be exactly the same as your old one). Specifications: Cylinder Material: Cast Iron Overall height: 98mm Deck Height: 78.5mm (Base gasket to Head gasket) Piston Height: 37mm Piston Diameter: 52.4mm Piston Pin Length: 41mm Piston Pin Diameter: 13mm Note: This one is very hard to find... if you find a cheaper one, be very careful, it's probably for a 110cc engine.