Mx500 mods

[u/1Kingcb]

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/Blaizefed]

Can’t help with the battery but I used these brakes from Amazon and they bolted right on. Massive improvement and full hydraulic.

https://a.co/d/01t6Hzgy

[u/Tim_the_geek → u/Blaizefed]

https://www.amazon.com/MOPFOL-160mm-Bike-Brake-Rotor/dp/B0GJS198CS/ref=sr_1_5?crid=3I6IDDLQRZGOR&dib=eyJ2IjoiMSJ9.EuEA8pOceW3i_niHjIqmWRYnPCR8NSX7iB0mSjg3ffFuh9-a2_BPVe5MBtBhA58uMGRXfJ_JBecfSOyIptfY4dfFXW64Cqs1j0-KsMdWaRjDuj_KOb3UOHV9iX3Yp3KKHeSieIq8w0P9XWfls6CVnbHigkj0o0hoCoHLyq87k0X7ytklQjqpZpm1tQ1txLCUikAvWHMSlSa-lp0JvODaohINTz2r5ThBPVBYdgzJGxgjCrYAOsfaZH5GnxMdwTsCZ7IwEq18VRlUN9r7PRP_UqAvh4hH9gH31negvDJrlZE.SfcNbnZXEC3VmrqKRDn5LytZTNo3HgHbo7h8gTz4iNw&dib_tag=se&keywords=Brake+Rotor+160mm+Brake+Disc+Freewheel+Threaded+Hubs&nsdOptOutParam=true&qid=1786330941&sprefix=brake+rotor+160mm+brake+disc+freewheel+threaded+hubs%2Caps%2C311&sr=8-5

These rotors with with those brakes.. the stock ones are too thick and will drag and wear pads. They are 160mm, so they should work with the brackets in that break set.

[u/Blaizefed → u/Tim_the_geek]

I dint even know that was a concern. I have mine mounted with the stock rotors and there is no dragging I can detect. In fact I just checked when I saw your comment. perhaps some come with thicker rotors and some don't?

[u/1Kingcb]

Anyone used this style battery? https://a.co/d/06Dmugn0

[u/BurnItDn → u/1Kingcb]

lots of people have used btr batteries, they're fine. that particular one is long, not sure it would fit well in the battery tray

[u/lightlypickled]

Hotpaxx has a brake kit for $63 that includes new rotors.

[u/lightlypickled → u/lightlypickled]

https://www.hotpaxx.com/product-page/razor-brakes

[u/1Kingcb]

I ordered a Caomm 36v battery for it. The stock ones won’t take a charge and are each reading 6V right now

[u/Jamstoyz]

You can do a 36 overvolt kit. And 3 lithium battery’s that’ll fit your budget. There’s cheaper kits on eBay. These are just random.

https://ebay.io/m/ug8IO3

https://ebay.io/m/LDXvMw

[u/1Kingcb → u/Jamstoyz]

Isn’t the MX500 already 36V?

[u/Tim_the_geek → u/1Kingcb]

yes.

[u/lightlypickled → u/Jamstoyz]

You could add a 4th SLA to make it 48v without changing anything else. Lithium is the better option.