RK 420 MXZ4 Heavy-Duty Motorcycle Chain, 134 Links (GB420MXZ4-134)

The RK 420 MXZ4 heavy-duty motorcycle chain is engineered for demanding off-road and motocross applications where durability, consistent power transfer, and shock resistance are essential. This 134-link chain features a robust chromoly steel construction with seamless rollers and bushings to support reliable performance under hard riding conditions. The RK GB420MXZ4-134 is designed to handle the repeated impacts and loads associated with aggressive jumps and technical terrain.
The chain uses chromized pins to improve wear resistance by more than two times compared with standard non-sealed chains. These pins also help absorb shock loads from extreme jumps, reducing stress on the drivetrain during demanding riding. This construction makes the RK 420 MXZ4 a practical choice for riders seeking a durable replacement chain for compatible off-road motorcycles and other powersports applications.
Each chain is heat-treated using RK’s exclusive Heat Induction Transfer (HIT) process. This treatment helps enhance strength and service durability while maintaining dependable chain operation in challenging environments. The seamless rollers and bushings contribute to smooth engagement with the sprockets, supporting efficient drivetrain performance throughout the chain’s service life.
The RK GB420MXZ4-134 is not recommended for street use and is intended for off-road applications. Confirm compatibility with your motorcycle’s chain size, sprocket configuration, and required link count before installation. Proper lubrication, adjustment, and regular inspection are recommended to help maintain performance and extend chain life.

Features:

• Chromoly steel construction for demanding off-road and motocross use

• Seamless rollers and bushings support smooth, reliable chain operation

• Chromized pins provide more than two times the wear resistance of standard non-sealed chain pins

• Chromized pins help absorb shock loads from extreme jumps

• Heat-treated with RK’s exclusive Heat Induction Transfer (HIT) process

• 134-link configuration for compatible motorcycle drivetrain applications

• Not recommended for street use

Ships from Parts Unlimited.