420 Chain Sprocket Mini Bike Sprocket 50 Tooth 40mm Bore Fit for Coleman BT200X CT200U CT200U-EX Baja Warrior MB165 MB200 TrailMaster Massimo KT196 196cc 200cc 6.5hp Powersports Go Kart Spare Parts

This combination kit, consisting of a 420 sprocket and a 15mm mini bike chain adjuster tensioner, is designed to fit Coleman, Baja, TrailMaster, and MASSIMO mini bikes equipped with Predator 212cc, 196cc, 200cc, or 6.5hp engines. The mini bike rear sprocket within the kit offers broad compatibility with specific models, including Coleman Powersports CT200U, BT200X, CT200U-EX, CT200U-EXR, and KT196, Baja Motorsports Mini Bike MB165 and MB200 (covering variants like Heat, Mini Baja, and Warrior), MASSIMO MB200, and TrailMaster MB200—making it a reliable upgrade or replacement solution for the transmission systems of these popular mini bike models. Crafted with high-quality precision-machined metal alloy, the sprocket ensures exceptional firmness and strong resistance to wear and tear, even with frequent use on various terrains, thus extending its service life and maintaining stable performance over time. In terms of performance, when the front sprocket remains unchanged, the larger rear sprocket (a key component of this kit) effectively increases the mini bike’s torque and climbing ability, providing the vehicle with more powerful output to conquer different types of terrain, whether it’s flat roads, slopes, or rough off-road paths. Detailed size specifications of the 420 sprocket further ensure proper fit: it features 50 teeth, a mounting hole distance (center to center, bolt hole circle) of 3-3/16 inches (80mm), a center hole diameter of 1-9/16 inches (40mm), an overall diameter of 8-3/16 inches (208mm), and four mounting holes each with a diameter of 5/16 inches (8mm). Paired with the 15mm chain adjuster tensioner, the kit not only enhances transmission performance but also helps maintain proper chain tension, reducing the risk of chain slack or damage and ensuring smooth power transfer between the engine and wheels for a safer and more enjoyable riding experience.