36V Controller and Throttle Compatible with Razor MX500 MX650 Dirt Bike, Control Module and Twist Throttle Handlebar Grips Replacement for Razor SX500 Electric Dirt Rocket Quad EcoSmart Parts

We got this controller for a razor MX 650 because after replacing and upgrading the battery it over voltage the original controller. This controller holds the 36 V battery very well as well as giving it a bit more power with some additional torque and horsepower. I would overall recommend this for the razor MX 650 as it was Plug-in and easy to install.

This was almost an exact replacement for my kids scooter. Now it's running all over the yard again. Way cheaper than buying a new scooter.

Great replacement for oem controller.

There has been a dead Razor MX500 in my pole barn for a while. The controller burnt up years ago. The batteries were also shot, but I replaced those separately. I have no idea what year it's from, but it is far from new. I think it's about a decade old.This did plug right into where the old controller was. I am definitely too big for that little electric dirt bike, and it's not for me, but I did ride around on it a bit just to see if it was going to work, and it seems to be fine. It was way too cold to let any of my gets go zipping around the farm. I got this in late October.As far as I can tell, everything seems fine. Installation wasn't difficult. I did have to remove a rather brittle plastic cover, but that's about it.