RCB 428 Heavy-Duty RX-Ring Gold Chain & E-Series Sprocket Kit – Yamaha R15 V3 / V4 / M

Restore crisp drivetrain acceleration, minimize mechanical power loss, and dramatically extend your bike’s mileage between adjustments with the ultimate RCB 428 Heavy-Duty Drive Kit.

This premium drivetrain package perfectly couples the high-mileage sealing performance of the RCB Advanced RX-Ring Gold Chain (132L) with the precision-milled, wear-resistant RCB E-Series 14T Front and 48T Rear Steel Sprockets. Tailored precisely to maintain factory gearing ratios for the Yamaha R15 V3, V4, and R15M platforms, this kit handles high-RPM sport riding effortlessly.

Key Features

1. RCB Advanced RX-Ring Pre-Stretched Gold Chain (428 / 132L)

• Advanced RX-Ring Sealing Technology: Features specialized cross-profile RX-ring rubber seals sandwiched between the inner and outer chain links. This design locks factory-injected synthetic grease inside the critical pin-and-bush area while keeping out abrasive grit, dirt, and monsoon rainwater.

• Factory Pre-Stretched & Heat-Treated: The high-tensile carbon alloy steel plates undergo rigorous heat-treatment cycles for superior tensile strength and are pre-stretched under load at the factory. This drastically minimizes initial “chain stretch” and alignment elongation during the break-in period.

• Premium Gold Anodized Coating: Finished with a striking, highly reflective gold outer plate coating that protects the raw steel from oxidation, rust, and road grime while adding an aggressive racing look to your swingarm area.

2. RCB E-Series Front & Rear Steel Sprockets (14T / 48T)

• High-Carbon SCM420 & S45C Steel: The 14T front sprocket is machined from case-hardened SCM420 chromoly steel to handle intense engine countershaft shearing forces, while the 48T rear sprocket is stamped from rugged S45C high-carbon steel for structural longevity.

• Computer-Generated Tooth Induction Hardening: The tooth profiles are precision-induction hardened to exact tolerances, reducing tooth hook wear, minimizing drivetrain noise, and ensuring fluid, low-friction link articulation.

• Lightweight Mud-Groove Layout: Designed to continuously shed built-up chain lube and road dust away from the roller contact patch, preventing premature chain-and-sprocket wear.

Technical Specifications

Why Run This Full Drivetrain Combo?

1. Eliminating Mismatched Wear Profiles: Installing a brand-new chain onto old, hooked sprockets (or vice versa) forces the new component to wear out up to three times faster due to altered link pitch matching. Changing all three components together resets your drivetrain wear lifecycle to zero.

2. RX-Ring Lifespan vs. Standard Chains: Standard non-O-ring chains quickly dry out, build up heat, and stretch within a few thousand kilometers under aggressive sport riding. The premium RX-ring barrier maintains low-friction rotation up to 2.5x longer than standard chains with minimal chain slack adjustments.

3. Optimized Power Transfer: Worn drivetrains cause significant drag, slack-slap, and wheel-power loss. This precise 14T-48T combination optimizes engine energy transfer straight from your transmission countershaft to your rear tire with minimal mechanical loss.

Installation Note: This kit includes a 132-link chain which provides ample length for various swingarm wheel-base positions. The chain must be cut down to the exact stock link length (typically 126 to 128 links depending on your model version) using a professional chain breaker tool during installation. Always use a fresh master link, line up your swingarm alignment markers accurately, and maintain roughly 25–30mm of vertical chain slack with the rider sitting on the bike.