Fit for MY1020 DC Motor Razor Kids Electric Off Road Motorcross Dirt Rocket Bike Scooter Mini Bike Go Kart Cart Parts. Compatible with : / Razor MX650 Dirt Rocket Bike/ Razor MX500 Dirt Rocket Bike/ Razor SX500 Mcgrath Dirt Rocket Bike/ Razor RSF650 Street Bike/ 36V Motor Pocket Mod Bellezza Scooter/ Notice: It fit for 25H Chain, Not T8F Chain. Motor Spocket Size：25H Chain, Teeth : 13T, Outer diameter ：29mm (1.14 inch), Mounting Diameter Length : 10mm (0.4 inch), Mounting Diameter Width : 8.5mm (0.34 inch), Tooth Thickness: 4mm (0.16 inch). Package Including : 1 x 25H Chain 13T Motor Sprocket, 5 x 25H Master Links. Please check the description to confirm the compatibility before purchase Fit for MY1020 DC Motor Razor Kids Electric Off Road Motorcross Dirt Rocket Bike Scooter Mini Bike Go Kart Cart Parts Compatible with : / Razor MX650 Dirt Rocket Bike/ Razor MX500 Dirt Rocket Bike/ Razor SX500 Mcgrath Dirt Rocket Bike/Razor RSF650 Street Bike/36V Motor Pocket Mod Bellezza Scooter/