The RK 420 MXZ4 heavy-duty chain is designed for motocross and off-road motorcycle applications that demand dependable performance under severe riding conditions. This 134-link chain features chromoly steel construction with seamless rollers and bushings for improved strength and durability. The RK 420 MXZ4 is built to handle the repeated impacts, acceleration, and suspension movement associated with jumps and aggressive off-road riding.
Chromized pins provide more than twice the wear resistance of conventional non-sealed chain designs while helping absorb shock loads from extreme jumps. Each chain is heat treated using RK’s exclusive Heat Induction Transfer (HIT) process to support consistent performance and extended service life. The chain is sized for 420 applications and is supplied in a 134-link configuration for compatible motocross and off-road motorcycle drivetrains.
This RK chain is intended for off-road and motocross fitment and is not recommended for street use. Verify the motorcycle manufacturer’s required chain size, link count, and drivetrain compatibility before installation. Manufacturer part number GB420MXZ4-134 and vendor part number GB420MXZ4-134 identify this specific RK 420 MXZ4 chain configuration.
Features:
- Size: 420 chain with 134 links
- Model: MXZ4 heavy-duty motocross chain
- Brand: RK
- Construction: Chromoly steel with seamless rollers and bushings
- Pins: Chromized pins improve wear resistance by more than two times compared with standard non-sealed chains
- Performance: Designed to absorb shock loads from extreme jumps and aggressive off-road riding
- Heat Treatment: RK exclusive Heat Induction Transfer (HIT) process
- Fitment: Intended for compatible motocross and off-road motorcycles using a 420 chain
- Use: Not recommended for street applications
- Manufacturer Part Number: GB420MXZ4-134
- Vendor Part Number: GB420MXZ4-134