XIKOBY MX500 Controller & Throttle Kit 36V Replacement for Razor MX500/MX650 — Heavy-Gauge Wiring, Twist-Grip

The XIKOBY MX500 Controller and Throttle Kit is a direct-fit 36V replacement module and twist-grip throttle engineered to restore and optimize performance on Razor MX500, MX650, SX500 and compatible electric dirt bikes.

If your Razor MX series dirt bike or compatible scooter has a worn controller or sticky throttle, this XIKOBY kit provides a plug-ready 36V control module and six-pin throttle that match the original fitment for several Razor models and similar electric vehicles. The assembly uses heavier power wiring and a constant-current control strategy to help stabilize motor draw and protect the battery, while the rubber twist grip improves handling under real riding conditions.

Which models will this XIKOBY kit work with?

The kit is designed for a broad set of 36V electric bikes and scooters. It directly fits Razor MX500 (V21+) and MX650 (V14+), SX500, McGrath electric dirt rocket bikes, Pocket Mod Bellezza scooters, EcoSmart Metro scooters, RSF650 electric street bikes, and many Dirt Quad 500 ATVs. Confirm the controller model number or connector type before installing.

• Compatible models: Razor MX500, MX650, SX500, McGrath, Pocket Mod Bellezza
• Also fits: EcoSmart Metro, RSF650, Dirt Quad 500 ATVs
• Controller model: HB3650-TYD6-FS-ROHS, part W15165070015
• Throttle connector: 6-pin male—verify your vehicle’s plug

How does the controller protect battery life and motor performance?

XIKOBY’s MX500 controller uses constant current control technology to maintain a stable incremental and dynamic current profile while the motor is under load. This reduces sudden surges and helps the battery provide power more evenly, which can extend usable battery cycles and smooth acceleration. It also includes an overload cutoff that shuts the motor down if pack voltage drops too low, preventing damage from deep discharge.

• Constant current control smooths power draw during acceleration
• 14AWG power motor wire for reliable current delivery
• 20AWG control wire for signal stability and safety
• Overload/low-voltage cutoff protects battery and motor

What features does the throttle and grip provide for everyday riding?

The throttle is a twist-grip style with a premium rubber overlay that increases friction for better grip and control, especially in wet or muddy conditions. It offers selectable power modes—power, full, and low—so riders can choose performance levels appropriate to skill or terrain. The unit is made to match twist-grip installations on supported Razor models for straightforward replacement.

• Twist-grip throttle with anti-slip rubber for secure handling
• Three ride modes: power, full, and low for adjustability
• Designed to replace factory twist-grip throttles on compatible bikes
• Durable materials to withstand frequent use and outdoor conditions

How difficult is installation and what should I check before buying?

Installation is typically a direct swap if your bike uses the same 36V controller footprint and a 6-pin throttle connector, but basic mechanical and wiring familiarity is recommended. Before purchasing, compare the controller part number and confirm your vehicle’s plug type, and inspect connector pins for corrosion. If you’re unsure, a short diagnostic or photo of your existing controller wiring will help verify fitment.

• Check part number: HB3650-TYD6-FS-ROHS, W15165070015
• Verify your throttle has a 6-pin male connector
• Inspect wiring gauge and connector condition before swapping
• Seek professional fitment help if you lack wiring experience

Who is this for: The XIKOBY MX500 Controller and Throttle Kit is aimed at riders and repairers who own a Razor MX500/MX650/SX500 or similar 36V electric dirt bike or scooter and need a reliable replacement controller and twist-grip throttle that preserve factory-like performance. It’s ideal for DIY mechanics, small shops servicing youth electric bikes, and anyone who wants sturdier wiring, selectable ride modes, and a safer low-voltage cutoff without replacing the entire vehicle.