We have two variable speed kits for the Razor Power Core E90 electric scooter.
Here are the links to them:
Without throttle top speed adjustable limiter: https://cart.electricscooterparts.com/variable-speed-kit-for-razor-power-core-90-power-core-e90-and-power-core-e95-electric-scooter
With throttle top speed adjustable limiter: https://cart.electricscooterparts.com/variable-speed-kit-with-throttle-speed-limiter-for-razor-power-core-90-power-core-e90-and-power-core-e95-electric-scooter
I see the variable speed kit for both the E100 and the Power Core E100. Was wondering if you also have a kit for the Power Core E90?