RCB S3 ALLOY LEVER SET R15 V4 INDO

RCB S3 Alloy Lever Set is a premium, ergonomic control upgrade designed specifically for the Indonesian-specification Yamaha R15 V4 / R15M (R15 V4 Indo).

The S3 Series replaces the standard non-adjustable factory cast levers with a highly refined, CNC-finished assembly. It is engineered to give riders micro-adjustable reach settings, improved finger leverage, and an aggressive racing aesthetic that aligns perfectly with the R15 V4’s YZR-M1 MotoGP-inspired design.

Important Variant Note: The Indonesian variant of the R15 V4 features distinct master cylinder and clutch perch configurations compared to versions sold in other markets (such as India or the Philippines). This specific kit is machined to match the Indo-spec master cylinder pivot pins and clutch brackets flawlessly, ensuring a crisp mechanical engagement with zero vertical lever wobble.

Key Features

• Premium Billet Alloy Construction: Milled entirely from high-strength aluminum alloy, offering a superior strength-to-weight ratio over brittle OEM cast levers. They are highly resilient against bending or snapping during track laydowns or accidental garage tip-overs.

• Adjustable Reach Dial: Features a precise, multi-position adjustment clicker that allows you to easily fine-tune the distance between the handlebar grip and the lever. This provides tailored comfort for both small and large hand sizes, maximizing control while minimizing forearm pump and fatigue during track sessions.

• Foldable Anti-Break Design: Incorporates an articulated pivoting joint configuration. In the event of a low-side slide or crash, the levers fold upward instead of snapping off at the perch, ensuring you aren’t left stranded on the street or track without controls.

• Aerodynamic Cut-Out (Wind Slot): Designed with a high-speed relief slot at the lever tip. This reduces aerodynamic drag and prevents “wind-induced brake drag” when tucked behind the windscreen at high top-end speeds.

• Hard-Anodized Armor Finish: Coated in rich metallic colors (such as Black, Gold, Red, Blue, and Silver) to lock out moisture and prevent color bleaching caused by intense UV exposure or aggressive chemical washes.

Technical Specifications

Installation Guidelines

1. Drop-In Compatibility: The S3 lever kit features R15 V4 Indo-specific mounting adapter blocks, making it a direct drop-in replacement for the stock master cylinder and clutch perch without requiring modifications.

2. Maintain Clutch Freeplay: When installing the S3 clutch lever, ensure you adjust the cable tensioner to retain the factory-recommended 10mm to 15mm of freeplay at the lever tip. Clamping the lever too close to the handlebar without adjusting the cable can cause premature clutch slipping and accelerated clutch plate wear.

3. Lubricate the Pivot Points: Apply a light layer of lithium or marine-grade grease onto the main shoulder bolts before sliding them into the pivot perches. This ensures incredibly smooth fluid movement and eliminates any stiff “metal-on-metal” rubbing.

4. Threadlocker Safety: Secure the pivot pins and lock nuts using a drop of medium-strength blue threadlocker (e.g., Loctite 242) to guarantee that constant engine vibrations from the high-revving VVA single-cylinder power plant don’t back the fasteners out over time.