A motorized bike engine’s piston pin is meant to keep the piston secure while it moves in and out of the cylinder. With the 100cc Piston Pin, you’re sure to get consistent fuel combustion and air compression. The 100cc Piston Pin connects to your 2-stroke engine’s pin to the crank arm. It then goes through the pin port and needle bearing on the crank arm to keep the piston secure during motion. When it’s time to replace your 100cc engine’s piston pin, you’ll be able to do so with ease as this part is simple to install. The 100cc Piston Pin will ensure you’re riding safely and smoothly.