GB420MXZ-114 Gold 114 Link Heavy Duty MX Racing Chain - Lightweight

In this review of the GB420MXZ-114 racing chain, the bottom line is simple: this chain is for serious motocross racers who need the lightest non O-ring chain that still delivers exceptional tensile strength. The reviewer found the chain stands out for its chrome-moly construction, oversized alloy pins and heat-treated components, which combine to offer a high strength-to-weight ratio for 50cc to 125cc open class racing. For riders who prioritize durability and reduced rotating mass over O-ring sealing, this chain earns strong consideration.

Key Features

• Chrome-moly construction: Provides a high strength base material that resists deformation under heavy loads encountered in motocross use.
• Oversized alloy pins: Designed to increase joint strength and reduce the risk of pin shear during hard landings and aggressive acceleration.
• Seamless rollers and bushings: Deliver smooth articulation and consistent engagement with the sprocket for reliable power transfer.
• HIT heat treatment: The Heat Induction Transfer process hardens components for improved wear resistance and longer service life.
• High tensile rating: A 5000 ft-lb maximum tensile strength gives confidence for professional-level 50cc to 125cc competition.
• Lightweight design: Weighing about 1.76 lb, the chain reduces rotating mass which helps throttle response and acceleration.

Who It's For

The GB420MXZ-114 is aimed at competitive motocross riders and professionals running 50cc to 125cc open class bikes who want a non O-ring chain that prioritizes low weight and high tensile strength. It is particularly suited for riders who replace stock chains with a stronger, lighter option and who perform regular maintenance rather than relying on O-ring lubrication seals.

Riders who want low-maintenance, sealed longevity from an O-ring chain or who need a chain for larger displacement bikes should look elsewhere, as this model is optimized for small-displacement open class racing and the non O-ring design trades sealed lubrication for reduced weight.

Pros & Cons

Pros

• High tensile strength and oversized pins provide excellent chain strength under racing loads.
• Lightweight construction improves throttle response and handling for small-displacement race bikes.
• Heat-treated components increase wear resistance, contributing to notable durability.
• Gold finish offers a clean, race-ready look that many riders appreciate.

Cons

• The non O-ring design means more frequent lubrication and maintenance compared with sealed chains.
• Specifically targeted to 50cc to 125cc open class use, so may not be ideal for larger motorcycles.

Specifications

Our Verdict

The GB420MXZ-114 is a focused race chain that delivers a winning combination of low weight and high tensile strength for 50cc to 125cc motocross competition. For racers willing to accept the extra maintenance of a non O-ring setup, it represents strong value thanks to its durable, heat-treated construction and race-oriented design.

Frequently Asked Questions

Is this chain suitable for 125cc motocross bikes?
Yes, the GB420MXZ is specified for professional level 50cc to 125cc open class racing and its 5000 ft-lb tensile rating supports that use.

Does the chain include a master link?
The product uses a clip-style master link, which is included to join the 114-link length.

How often does a non O-ring chain need servicing?
Non O-ring chains like this require regular cleaning and lubrication more frequently than O-ring chains to maintain wear life and performance.