Check the listing for details. Razor 36v E300,E325,MX350,MX400 electrical kit 36 Over Volt Kit. Condition: New. Listed at 49.99 USD. IF YOU WOULD LIKE ANY OTHER THROTTLE PICTURED ABOVE YOU MUST SEND A MESSAGE AT CHECKOUT WITH THE # YOU SEE IN THE PICTURE AND THEN CLICK "AD MESSAGE" AFTER YOU TYPE IT OR IT COMES AS PICTURED IN MAIN PICTURE. This kit does not work with the brand new style HD/ Hub Drive (motors built into the wheel) this kit only works with brushed motors (only has 2 wires on them) TAKE NOTE--------THIS WILL NOT WORK WITH A "STOCK 24VOLT" RAZOR SYSTEM, THIS IS A 36VOLT KIT TO RUN YOUR EXISTING 24VOLT RAZOR IN 36VOLT FOR 50% MORE POWER..IT WILL NO LONGER WORK IN 24VOLT AND YOU WILL NEED TO AD A 3RD BATTERY IN SERIES FOR IT TO WORK! THIS KIT ALSO WILL NOT WORK WITH ANY OF THE HD HUB DRIVE MOTORS. 36VOLT ONLY 36VOLT ONLY IF YOU WOULD LIKE ANY OTHER THROTTLE PICTURED ABOVE YOU MUST SEND A MESSAGE AT CHECKOUT WITH THE # YOU SEE IN THE PICTURE AND THEN CLICK "AD MESSAGE" AFTER YOU TYPE IT OR IT COMES AS PICTURED IN MAIN PICTURE. You will need a 36volt charger also,we offer it- Ebay item #131354719863 This 36v kit is to run your existing 24volt razor motor in 36volt for 50% gains. Fits the following listed but you need a 3rd battery and 36v charger..Your mx350 mx400 will no longer work in 24volt. All versions of the ---Razor e200,e300 threw to the e325s Pocket mods,Bellas Dirt quads (24volt ones) not the DQ500 Mini Choppers Pocket Rockets Mx 350, Mx400 Fits ALL versions of those! You will need another charger also,we offer it- Ebay item #131354719863 We are the original makers of this product, we use what we sell..Other copy cat sellers have no clue how to even plug in a controller and have no way to test controllers or give phone and text support like we do, ask them and see for yourself. Our controller is standard 500 watts unlike other copy cats selling a cheap generic 300 watt controller which will NOT properly work when overvolting a 250 watt motor, You must use a 500 watt controller! If your buying our 24v 500 watt direct fit motor then simply request this in 1000 watts and its free to upgrade but if you run the 1000 threw the stock 250 watt it will be harder on the motor so make your choice. The low voltage cutoff is 30.5 volts and do not exceed 42volts for the people doing lipo.. With our throttle with key kits we ad taillight and brake light outputs and we offer a headlight kit all are plug n play. Headlight kit- eBay item number:143932816959 36v Brake or taillight kit- eBay item number:132221336857 Reduce top speed with our hidden speed reducer setup- eBay item number: 222627137275 Remember to send a note to get the throttle you like as pictured above, the ones with key work best to keep it safe and no need for factory on off switch anymore or you can request our digital voltage readout with key in anodized red,blue or chrome at checkout instead. We suggest our 65 tooth sprocket kit with this setup ("only fits the razor e300 NOT the MX scooters) as this kit alone gives you 50% more top speed and a little more torque but when you ad the 65 tooth sprocket and chain kit it hits the inclines like nothing! eBay item number: 222627137322 Attention-This is a 36V OverVolt Variable Speed kit which means you will need 3 batteries in total and this kit will ONLY run in 36v NOT 24v-NO BATTERIES ARE INCLUDED IN THIS KIT..This kit requires modification in order to fit 3 batteries... You will need another charger also,we offer it- Ebay item #131354719863