This Yamaha TTR 110 Big Bore Kit RACING 128CC + FREE TOP SET GASKET is a complete set that includes wrist pin, gasket, and piston rings. It is suitable for dual sport, street, and off-road motorcycles with a 4-stroke engine type and a piston diameter of 55mm. The kit is made of cast iron and aluminum alloy materials, and it weighs 1.65 KG/SET. The ESPADA brand kit has a manufacturer warranty of 3 months and is made in Taiwan. It is a high-performance part that is perfect for vintage and OE/OEM parts. The kit is ideal for those who want to upgrade their motorcycle's engine, and it comes with a free top set gasket.