Features: 1.Fitment: Chain roller tensioner is replacement for Doodlebug 212 Predator Motor Mini Bike, replacement for SSR SDG 110cc 125cc 140cc, replacement for XR CRF50. 2.High Quality Material: Chain tensioner is made of high quality ABS and steel alloy material, rustproof, high strength, sturdy and durable. 3.Function: Spring loaded chain tensioner keeps chain from popping and snapping, not easy to bend or deform, have a long service time. 4.Excellent Performance: Professional manufacturing, exquisite workmanship, high efficiency, stable performance and high reliability. 5.Simple Installation: The installation is simple, no complex operation is required, convenient for using, save your time and energy. Specification: Item Type: Chain Roller Tensioner_x000D_ Material: ABS+steel alloy_x000D_ Application: A brand new aftermarket replacement for the original spring bearing chain idler tensioner and pulley_x000D_ Function: Protect the swing arm and help guide the chain correctly, prevent the chain derailment, sprocket excessive wear, prolong the life of the chain._x000D_ Fitment:_x000D_ Replacement for Doodlebug 212 Predator Motor Mini Bike _x000D_ Replacement for SSR SDG 110cc 125cc 140cc _x000D_ Replacement for XR CRF50 Dirt Pit Pro Dirt Bike 4 Wheeler Quad _x000D_ Replacement for Polaris Outlaw 90 Quad