MRU U-Ring Motorcycle Chain - 420 Monkey and Grom Chain

Black Scale

Black inner and outer sideplates with gold pins and rollers

Perfect for Monkey & Grom

U-Ring Seal

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 and will require less chain adjustments compared to non-sealed 420 chains. MRU is available in RK’s Black Scale finish with black inner and black outer sideplates with gold pins and gold rollers.

Tensile Strength: 4,540 lbs
Max CC Rating: 150cc Street, 150cc Off-road
Max Horsepower: 35 HP
Weight: 1.74 lbs
Max Chain Width: 17.1mm
Master Link Included: Clip type
BL420MRU-120 $160.04

MRU is only available in Black Scale color. Black inner and outer plates with gold pins and rollers.
To get the most out of your chain see our chain maintenance video.

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“The new MRU chain by RK is the perfect match for today’s small bore bikes. Its precision and smooth. We use them on our custom builds and even our employees use them!”