RCB E2 SERIES BRAKING SYSTEM
RCB S1 SERIES BRAKING SYSTEM
Recommended Additional Upgrades
RCB S1 Hydraulic Clutch Slave Cylinder Pump (12.7mm) – Racing Red is a high-performance drivetrain conversion component engineered to replace standard, high-friction mechanical cable clutch systems with a silky-smooth, self-adjusting hydraulic actuation line.
By upgrading to an inline hydraulic slave cylinder setup, riders experience an instantaneous reduction in lever pull effort, highly predictable engagement points, and zero cable stretching over time—making it a vital modification for street sportbikes, underbones, and track machines.
Key Features
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Precision 12.7mm Internal Bore: Precision-sized with a 12.7mm internal piston diameter. This specific dimension optimizes hydraulic leverage ratios when paired with a matching left-hand handlebar master cylinder, resulting in a feather-light lever pull that significantly reduces hand cramps in heavy city traffic.
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Fully Forged Aluminum Body: The main actuator housing is forged from high-density aluminum alloy rather than cast metal, offering extreme structural integrity that prevents body flex or internal fluid bypass under heavy racing pressure.
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Premium Hard-Anodized Racing Red Finish: Treated with a durable, chemical-resistant hard-anodized layer. This coating gives your lower engine casing a striking factory racer appearance while shielding the metal against heat scaling, mud, and corrosive brake fluids.
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Self-Adjusting Plunger Clearance: Unlike traditional mechanical cables that slacken as your engine’s internal clutch friction plates heat up and expand, this hydraulic unit automatically compensates for plate wear, keeping your friction zone in the exact same spot on the handlebar from start to finish.
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Integrated High-Access Bleeder Nipple: Outfitted with a pre-installed, zinc-plated fluid bleeder valve shielded by a rubber dust cap. Its top-facing position simplifies the initial bleeding process, making it easy to purge micro-air pockets out of the lower system housing.
Technical Specifications
| Feature | RCB S1 12.7mm Clutch Pump Details |
| Product Line Family | S1 Performance Drivetrain Conversion Series |
| Piston Bore Diameter | 12.7 mm |
| Primary Material | High-Grade Forged Aluminum Alloy Housing |
| Fluid Feed Thread Inlet | Standard M10 x 1.25mm Thread Pitch |
| Actuator Rod Length | Adjustable Threaded Shaft with Locknut |
| Recommended Fluid | High-Boiling Point DOT 4 Brake Fluid |
| Colorway Finish | Anodized Racing Red |
