Check the listing for details. Razor Mx500 Mx650 Mx500 Mx650 4 Pin 6.3mm To Xt60 Adapter For Lithium Upgrade. Condition: New. Listed at 6.00 USD. Looking to put in a lithium upgrade into your razor and want to keep the factory harness? Have a razor that came with and xt60 and need this adapter? Here is what you need to plug in all lithium XT60 into and razor controller or Fast Scooters controller. Comes standard with the 4 pin connector (with 2 pins in it) that matches to the fast scooters mx500 mx650 controller and throttle kit.Looking to put in a lithium upgrade into your razor and want to keep the factory harness? Have a razor that came with and xt60 and need this adapter? Here is what you need to plug in all lithium XT60 into and razor controller or Fast Scooters controller. Comes standard with the 4 pin connector (with 2 pins in it) that matches to the fast scooters mx500 mx650 controller and throttle kit.