Koso

Description: High-Performance Koso Camshaft A12 2-Valve designed specifically for the GY6 Engine. This cam is ideal for increasing low-end power. With its increased leading slope and later intake valve opening makes this the perfect upgrade to go along with your larger displacement cylinder, b..

Description: Koso’s High-Flow Oil Pump (NF239000) for 125/150cc GY6 engines is strongly recommended for those who upgraded their engine with a Big Bore Kit. The addition of this high-quality part will increase the oil flow by 20%, which is a very effective modification that will help prevent engine ..