This is a overvolt kit that MUST be ran in 48 Volts only meaning you will need to ad another battery to run this and a 48volt charger to charge it and neither come with this kit,,it will only run in 48 volts,minimum voltage/low voltage cut off is 41.5..We sell a plug n play charger for this kit when installed also - eBay item number: 322468377682-Is the charger for this kit.

Now you can keep it safe and know EXACTLY how much battery life you have with our built key with a Digital display with ball milling!..


 Comes standard in Red but we also have anodized Blue,Gold and Chrome as pictured above available in other auctions..

This is a much better controller that's always in stock and competitive on price with performance gains of up to 10+mph?

  We were the first manufacture of variable speed kits for all the razor products and now we offer a version for your MX500, MX650 or Eco Smart with a built in key on the throttle which turns your scooter on and off and you have a fancy multimeter display for exact voltage readings..

  This kit plugs right in like stock but plugs in directly to the batteries 4 pin connector bypassing the on/off switch harness and its slightly different in size and requires zip ties to keep in place or set it in on some scooters..It comes with a matching grip and you have a actual full twist throttle instead of the half twist ones.

  You can fit all 4 batteries in the factory case and we have directions on how to, if you would like them simply ask for them at checkout. 

   We also ad optional Brake Light and Tail light/Headlight outputs on this controller and we sell LED plug N play kits too for them that will light up your scooter to keep you safe and seen(our headlight kit will light up the woods,12 watts,and looks like a car with hi beams on coming at you) so check them out in our ebay store! -If you do not want these options added just send a note.

Fits all versions of the MX500, MX650 & Eco Smart...

This item is tested prior to shipping..If you find it to not work on your Bike then you have another issue,,If you need help then you can call customer service at---941-404-5915---Please if your not sure you need this,dont buy it,simply find a volt meter and call us to help verify whats wrong with your scooter..

Need more than 1 kit,once you use it you will---So buy as many as you want for only $3 extra shipping for each item!

Controller connections

1 brake switch,male 3 pin connector,does not use center pin
1 brake switch,male 3 pin connector,does not use center pin
1 motor wire female-2 pin
1 Battery wire male-3 pin
1 charger port female-2 pin
1 Throttle plug that matches our throttle,simply plug it in

Optional Brake light output

Optional Tail Light output

We accept returns but there is a 20% restock fee and it has to be returned undamaged..

4 1/4 inches (stock is 4 1/2)-fits perfect but does not lign up to holes,velcro works great.Throttle Wire Length: 77 inches-(stock is 57 inches) so you have plenty of wire (if you want it cut exact for the MX send a note and we will cut it exact fit)