XIKOBY MX500 36V Controller and Twist-Grip Throttle Kit for Razor MX500 MX650 SX500 — constant-current, 6-pin plug

XIKOBY MX500 Controller and Throttle Kit is a 36V replacement speed controller and twist-grip throttle assembly designed to restore or upgrade Razor MX500, MX650, SX500 and compatible electric dirt bikes and scooters.

This plug-and-play control module and throttle pair replaces worn or damaged original parts on multiple Razor models and a range of compatible electric scooters and minibikes. Built with constant-current control logic, U.S.-standard wiring, and a twist-grip throttle that includes power, full and low modes, the kit focuses on stable power delivery, rider safety and improved grip feel. The throttle uses a 6-pin male connector — check your bike’s connector before ordering.

Will this controller fit my Razor MX500, MX650 or SX500?

Compatibility covers specific MX and SX models plus several other makes that use the same 36V controller format. Confirm model references and connector type before installation to avoid misfit.

• Fits Razor MX500 (V21+) and MX650 (V14+), SX500 and McGrath electric dirt rocket bikes
• Also compatible with Pocket Mod Bellezza, EcoSmart Metro, RSF650 and 500 ATV variants
• Controller model HB3650-TYD6-FS-ROHS, part number W15165070015 — verify against your unit
• Throttle uses a 6-pin male connector; inspect your bike’s plug orientation

How does the constant current control help performance and battery life?

The controller’s constant current management moderates the incremental and running current to the motor, reducing abrupt power spikes that stress batteries and electronics. That more consistent current profile supports steadier acceleration and helps prolong battery longevity without changing rider behavior.

• Limits sudden current surges that shorten battery lifespan
• Maintains more even running current under variable loads
• Uses 14AWG power and 20AWG control wiring that meet U.S. standards
• Helps stabilize throttle response during acceleration

What safety features are included with this controller and throttle kit?

The unit includes built-in overload protection that cuts motor power when battery voltage drops below a safe threshold. This prevents continued operation on an under-voltage battery, reducing the risk of damage to the battery or motor and helping maintain predictable riding behavior.

• Automatic motor shutoff when battery voltage is too low
• Stabilizes speed under heavy load to avoid stalling
• Durable wiring and connectors reduce risk of electrical faults
• Twist-grip throttle includes anti-slip texture for secure control

What should I know about the throttle design and installation?

The throttle is a twist-grip type with a textured rubber sleeve for grip and anti-slip performance. It offers selectable power modes (power, full, low) to match rider preference or application and is intended to replace models that use a similar twist-grip connector and mounting style.

• Premium rubber grip improves handling and rider comfort
• Three selectable speed modes for flexible use
• Designed for handlebars that accept twist-grip throttles
• Check connector pin count and orientation before fitting

Who this kit is for: The XIKOBY MX500 Controller and Throttle Kit is suited to riders, repair shops and DIY mechanics who need a reliable 36V replacement for older or damaged controllers and throttles on Razor MX500/MX650/SX500 models and compatible scooters or minibikes. If you want a more predictable current profile, improved grip, and a direct replacement that follows original wiring standards, this kit is a practical choice. Ensure your vehicle uses a 6-pin male throttle connector and matches the listed model references before purchase.