Piston group kit for Honda Dio, AF scooters: a cylinder and piston matched to each other. This is where the fuel burns and gas pressure is turned into engine work. The 39 mm diameter is given in the name. The packaging is blue, as stated in the name.
Install the kit when the cylinder is worn or damaged by scoring, compression is lost, and the engine smokes and lacks power. The new kit saves you from boring the cylinder and matching a piston.
- Before assembly, clean and inspect the mating surfaces.
- Lubricate the moving parts with engine oil and break in the engine at moderate rpm.
