The RK 420 MRU chain is a lightweight, low-friction sealed chain designed for compact motorcycles and minibikes. Featuring RK's proprietary Ultra Thin Seal U-Rings, the BL420MRU-120 uses a seal less than half the thickness of many conventional O-ring seals. This design helps reduce friction while retaining effective protection against dirt, moisture, and contaminants.
Engineered for extended service life, the RK MRU chain is designed to provide up to four times the chain life of comparable non-sealed 420 chains and may require fewer chain adjustments during use. Its black finish gives the chain a clean, durable appearance, while the 420 pitch specification provides compatibility with applications designed for this chain size. The 120-link configuration can be cut to the required length during installation when appropriate.
Brand: RK
Manufacturer: RK Takasago Chain
Manufacturer Part Number: BL420MRU-120
Vendor Part Number: BL420MRU-120
Model: 420 MRU
Fitment: Ideal for Honda Monkey and Honda Grom applications using a 420 chain specification. Confirm the motorcycle's year, sprocket configuration, and required chain length before installation.
Features:
- Ultra Thin Seal U-Ring design helps reduce friction compared with conventional O-ring chains
- Designed for up to four times the service life of comparable non-sealed 420 chains
- 120-link chain configuration supports sizing for compatible applications
- Lightweight black sealed chain for reduced maintenance and dependable protection
- Ideal for Honda Monkey and Honda Grom motorcycles using a 420 pitch chain