50 tooth sprocket for 420 chain Also used on the Coleman BT200X series & CT200U mini bike models Rear wheel sprocket for all versions of the Baja Mini Bike (Baja Heat, Mini Baja, Baja Warrior) including the MB165 and the newer MB200 models This is a match to the standard OEM sprocket with 50 teeth. Note: Depending on current stock, this sprocket may arrive to you in silver or black Rear wheel sprocket for all versions of the Baja Mini Bike (Baja Heat, Mini Baja, Baja Warrior) including the MB165 and the newer MB200 models. This is a match to the standard OEM sprocket with 50 teeth. Note: Depending on current stock, this sprocket may arrive to you in silver or black. In addition to the Baja MB165 and MB200 mini bikes, this 50-tooth sprocket is the exact same component that Coleman uses on their BT200X series and CT200U mini bike models. Size: 420 Chain Teeth: 50 Tooth Mounting Hole Distance (center to center, bolt hole circle): 3-3/16″ (80 mm) Center Hole Diameter: 1-9/16″