r/RazorMods

Most compatible Battery

Most compatible Battery

First build, I’m just getting into this. Looking for a good battery that will help me get the most out of this motor. I’m having a hard time. For 2000w, it is suggested that I get a battery than has at least 40a to 50a bms. I heard that the BTR battery is good and it is rated for 40a bms, but says it only applies to 250-1000w motors. Then a lot of batteries I see say they are for up to 2000w motors, but 30a bms. Wtf, am I looking in the wrong place?

u/tgunn10 — 1 day ago

I want to get a new wiring harness for my sons mx350 that was given to me. Does anyone know which version this serial number is? I don’t know if I need a 3-pin or 4-pin wiring harness.

u/MrUpVoteDownvote — 2 days ago

Upgrading a Razor MX350 for My 10 Year Old - How Big of a Project Is It?

For my 10-year-old’s birthday, he really wants to upgrade his Razor MX350. I have no idea how to do it, but I’m pretty capable and willing to figure it out. My main questions are: how big of a project is this, and is there a complete upgrade kit I can buy, or do I need to purchase all the parts separately?

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u/SoCal_JuiceBox — 3 days ago

36v Modified Mongoose Z350

I modded this mongoose Z350. Found this in the trash year ago but I didn’t bother w it. Was gonna throw it out but I modded it to 36v. This is running a 36v 800w motor, 36v 1000w speed controller, custom throttle, and welded 22t sprocket and chain.

u/Majestic_Ear_2971 — 4 days ago

Swing arm Extension

Hey guys, I’m curious to know if anyone has ever made their own swingarm extension for the MX650. If so, could you drop the blueprint for a fellow boy who wants one but can’t afford the ridiculous amount they cost. Thanks in advance!

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u/Cofee8 — 6 days ago

Help a mom desperate mom out!

I bought this used mx650off marketplace and they said it needed a new battery. We installed a new battery still didn’t work, the throttle would only light up when plugged in, we then replaced the controller same problem throttle will only light up when plugged in, we’ve checked the batteries they are putting out 36v, last night we bypassed the throttle and the back wheel spun like crazy so we thought has to be the throttle. I just plugged in a new throttle, same problem. Help! I have a heart broken little boy and I’m at a loss,

u/morganlyla — 9 days ago

Mx500 mods

Trying to keep this to a budget build. It’s for a 5 year old right now. Batteries are 6 months old. Rear brake is the wrong one and disconnected. I’d like to upgrade brakes and new plastics to clean it up a bit. I paid 100 for it and would like to stay under 300. Doesn’t need to gain any speed right now. Any budget lithium batteries to extend run time?

u/1Kingcb — 10 days ago

Rate 1/100

Performance/mechanical

* 48V Hotpaxx battery
* MY1020+ 3000W motor
* 48V or 72v i forgot controller
* kit Throttle
* #35 motor sprocket
* #35 rear sprocket
* #35 chain
* Chain breaker
* Upgraded motor mount
* Chain guard
* Battery/mounting straps
* Seat / bike cover

Electrical/accessories

* 12V power source
* KEMIMOTO 60W Bluetooth/FM speaker
* RGB
* Key switch
* Bike speedometer
* Mirrors
* Rechargeable rear light/turn signals
* Phone mount
* USB charging station
* USB fan for motor
* Electric horn/light

u/MakeDickieGamesGreat — 11 days ago
▲ 4 r/RazorMods+2 crossposts

48v razor losing .1 v every 45 seconds?

Just finished doing a fast scooters 48v over volt kit for my sons razor but now it loses charge at about .1 volts every 45 seconds, anyone know why this would be?

I charged the batteries full before hooking up the 4th fully charged one

When I plugged it in it was at like 52v and charged up to 56.6 but the charger fan kept turning off and back on when the light turned green so l unplugged it and then the volts started dropping, any answers would be great

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u/Aj_chinook — 11 days ago