The RK Excel GB420MXU2-120 is a gold-finished 420-pitch drive chain engineered for dependable performance on off-road motorcycles, mini bikes, and other powersports applications using a 420 chain size. This 120-link chain features RK’s U-Seal technology for increased durability without excessive drag, making it a practical choice for riders who need consistent power transfer and extended service life.
RK’s UW-Ring sealing system provides triple-barrier grease protection and anti-debris technology. By limiting contamination and debris friction between internal components, the chain helps reduce wear and preserve smooth operation. The U and UW seals also use smaller contact points to minimize cold-start drag, while the thinner seal profile supports efficient movement and a longer operating life compared with conventional O-ring designs.
With a tensile strength of 4,540 pounds, the GB420MXU2-120 is rated for off-road applications up to 150cc and up to 35 horsepower. The chain is supplied with a clip-style master link for installation. Verify the motorcycle or powersports manufacturer’s chain size, required link count, horsepower, and clearance before ordering to ensure proper fitment. Manufacturer part number GB420MXU2-120 and vendor part number GB420MXU2-120 identify this RK Excel chain.
Features:
- Size: 420 pitch, 120 links
- Finish: Gold-colored outer plates
- Seal design: RK U-Seal and UW-Ring technology with triple-barrier grease protection
- Anti-debris protection: Helps reduce contamination and friction between internal chain components
- Low drag: Small seal contact points help reduce cold-start resistance
- Tensile strength: 4,540 pounds
- Application rating: Suitable for off-road vehicles up to 150cc and 35 horsepower
- Master link: Clip-style master link included
- Brand: RK Excel
- Manufacturer part number: GB420MXU2-120
- Vendor part number: GB420MXU2-120