This is a brand new ADJUSTER.
Most Chinese 70cc 90cc 125cc 140cc Dirt Pit Bikes.
Honda CRF-50, XR-50 Thumpstar,SDG, BBR, WildFire, Pitster Pro, SSR, Roketa, New Star, Red Barron, Sikk MX, Xtreme and all most China Built pit Bikes.
It is necessary for all serious riders. It protects swing arm & helps guide chain correctly.
It ensures proper chain tension and alignment. It prevents the chain derailment, excess wearing of the sprocket and prolong chain's life.
If you don't have the proper chain tension, the chain will get lose or break. Eventually, it will damage the side cover and the stator plate.
Polyurethane roller for a longer wear life.
Spring is included.
Please check the picture before you buy.