My favorite replacement throttle/controller is this:
https://www.ebay.com/itm/162311317469?s ... 1436.l2649
It's really easy to hook up and gives very solid performance. At $30.00 USD, it's considerably cheaper than a stock controller for your scooter!
I hope this helps.
1st computer I used - Tandy TRS-80, 1st computer I owned - IBM PC-XT, 1st computer I fried - IBM XT-286
Pulse Charger Revolution, current stock w/ lead-acid batteries, (soon to change......)
Razor E300, modded with YK41B, Unite 36v 1000w, disc brakes