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MRU U-Ring Motorcycle Chain

Perfect for Monkey & Grom
U-Ring Seal
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RK BL420MRU SEALED LIGHTWEIGHT PERFORMANCE CHAIN

Lightweight, low friction, sealed, U-Ring 420 pitch chain perfect for Honda® Monkey and Honda® Grom.

MRU features RK’s proprietary Ultra Thin Seal, U-Rings, where the thickness of the seal is less than 50% of the most common O-ring seal. This allows RK to design a Sealed Chain with the weight of a Non-Sealed Chain. MRU will feature 4 times longer chain life than comparable non-sealed 420 chains. MRU will require less chain adjustments compared to non-sealed 420 chains.

  • Tensile Strength: 4,540 lbs
  • Max CC Rating: 150cc Street, 150cc Off-road
  • Rated for 25 Horsepower
  • Weight: 1.74 lbs
  • Master Link Included: Clip type
MRU is only available in Black Scale color. Black inner and outer plates with gold pins and rollers.

MRU Chain Used on Yoshimura Project Mokey Bike!

Check out the Yoshimura R&D project Monkey bike using RK's MRU chain.

Is It Time To Replace Your Chain?

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