Product Overview

This is a 4-inch Swing Arm Extension Upgrade Kit designed for Razor MX650 and SX500 Mini Bikes. Made from billet aluminum, it helps improve straight-line stability and handling while providing additional swing arm length for your bike setup.

Product Information

• Condition: Brand New

• Type: Swing Arm Extension Upgrade Kit

• Material: Billet Aluminum

• Color / Finish: Black

• Quantity: 1 Set

Key Features

• 4-inch swing arm extension design for upgraded rear suspension geometry.

• Made from billet aluminum for strength, durability, and long-term use.

• Helps improve high-speed stability and straight-line tracking.

• Helps reduce the tendency of the front wheel to lift during acceleration.

• Stock wheels can be used; aftermarket pit bike wheels may also be compatible.

• Brake mounting holes feature oval slots with approximately 51mm spacing for adjustment.

• Designed to work with common aftermarket brake kits and should work with stock brakes.

• Minor wheel spacing adjustments of approximately 1–2mm can be made using 1/2-inch washers.

• Larger spacing differences may require a wheel spacer kit with appropriate thickness.

Compatibility

• For Razor MX650 Mini Bike

• For Razor SX500 Mini Bike

Please verify your bike model and installation requirements before purchase.

Package Includes

• 1 × Swing Arm Extension Upgrade Kit

• Installation hardware/components as shown in the pictures