RCB E2 SERIES BRAKING SYSTEM
RCB S1 SERIES BRAKING SYSTEM
RCB S3 Series Brake Caliper is a high-performance, dual-piston hydraulic upgrade precision-engineered for specific high-performance Yamaha motorcycle and scooter platforms. Built to deliver race-grade stopping power, this caliper serves as a direct-fit Front Caliper upgrade for the Yamaha R15 (V3/V4), R15M, MT15, and XSR155, as well as a direct Rear Caliper upgrade for the Yamaha NMAX and Aerox V2/NVX V2 (equipped with rear disc brake assemblies).
By utilizing an advanced Forged Monoblock body, the S3 Series completely eliminates the structural body flex common with multi-piece stock calipers, providing a firm, responsive lever feel and highly predictable braking control.
Key Features
Forged Monoblock Architecture: Fully sculpted from a single piece of compressed high-tensile alloy matrix. Eliminating joining bolts prevents structural body expansion under extreme hydraulic line pressure, resulting in a firm, zero-sponginess brake lever feel.
25mm Dual-Piston Clamping System: Outfitted with twin 25mm high-flow pistons. This dual-piston configuration doubles the surface area of hydraulic fluid contact, distributing clamping force evenly across the brake pad face to eliminate uneven pad wear and maximize deceleration bite.
Reinforced Structural Heat Dissipation: Designed with a low-profile, aerodynamically ribbed caliper body that acts as an integrated heat sink, rapidly shedding thermal buildup under aggressive, high-speed braking conditions to prevent fluid boiling and brake fade.
Anodized Weather Protection Coating: Coated in a deep, premium anodized layer that protects the alloy core against harsh road salts, grit, and corrosive DOT racing fluids.
Plug-and-Play Bracket Alignment: Each kit ships with a model-specific bracket engineered to align the dual pistons perfectly with your factory rotor disc diameter, removing the need for custom fabrication or machining.
Technical Specifications
| Feature | RCB S3 Series Caliper Details |
| Series Classification | S3 Performance Dual-Piston Range |
| Caliper Type | 2-Piston (Opposed Twin-Pot) Configuration |
| Piston Diameter Size | 25.0 mm (Dual Pistons) |
| Material Base | High-Grade Forged Hard Alloy Matrix |
| Fluid Feed Inlet | Standard M10 x 1.25mm Thread Pitch |
| Compatible Brake Pad | RCB S3-Series Specific Organic/Sintered Compound |
| Included Components | Pre-installed Brake Pads, Model-Specific Mounting Bracket |
Model-Specific Application Layout
Because this universal-series caliper caters to two distinct wheel layouts across the Yamaha family, ensure correct model positioning during installation:
Front Wheel Mounting: Direct-fit upgrade for Yamaha R15 V3/V4, R15M, MT15, and XSR155. Upgrading the front single-pot factory unit to the S3 dual-piston system sharpens initial front wheel bite, giving sport riders more trail-braking control into corners.
Rear Wheel Mounting: Direct-fit upgrade for Yamaha NMAX and Aerox V2 / NVX V2 (disc variants). Upgrading the rear caliper balances hydraulic lever pressure across your handlebars, ensuring stable rear tracking and seamless integration with factory anti-lock braking systems (ABS).
