2Pcs 12Volt RS550 40000RPM 24Volt 40000RPM Fast Electric Motor Drive Engine for Power Wheels Motor Upgrade,High Speed Motor Gearbox Accessories for Kid Ride on Toys Car Motor Upgrade Replacement Parts,Hot Horse Motor,12V&18V&20V&24V,8T&9T&10T&12T&16T Choice: If Your Power Supply Voltage is 12v, Please Select 24VRS555 (When 24V Power Supply, Motor Speed is 35000rpm. When 18V Power Supply, Motor Speed is 18000rpm. When 12V Power Supply, Motor Speed is 10000rpm) Advantages: The Motor Adopts 40000RPM High-Speed Motor, Which Matches Pure Copper Winding Coils and High-Quality Cooling Fans, Which Can Greatly Improve the Speed and Life. After Comparison, It Can Usually Increase the Speed By 2 Times Than the Original Motor. Widely Applicable: It Contains 7 Kinds of Teeth of Different Specifications, Which can be Widely Used in Various Types of Motor Gearboxes. There is No Need to Worry About the Different Teeth.(Including 8 Teeth, 9 Teeth, 10 Teeth, 12 Teeth, 16 Teeth) Installation Method: Compare the Steel Teeth on the Original Motor, Select the Teeth of the Same Size, And then Use Hammer to Knock on the Motor Shaft (Please Place the Bottom of the Motor on Solid Surface as Shown in the Figure to Beat), The Motor Cable Can be Installed on the Motor Copper Sheet with One Key.