Brembo RCS Front Clutch Master Cylinder for 1-Inch Bars, Part Number 110A89770

The Brembo RCS front clutch master cylinder delivers race-inspired control, refined lever feel, and precise clutch modulation for riders who want greater confidence and adaptability from their motorcycle controls. Built around Brembo’s patented Ratio Click System, the RCS mechanism allows the rider to select between a more direct response and a smoother, more progressive feel. This adjustable design helps tailor clutch engagement to riding conditions, personal preference, and the demands of performance-oriented street or track use.
Designed for handlebars using one-inch controls, this Brembo master cylinder provides consistent hydraulic performance and improved feedback at the lever. Its adjustable response characteristics make it easier to fine-tune clutch operation for smoother starts, controlled low-speed maneuvering, and confident gear changes. The compact radial design supports a clean, performance-focused cockpit while maintaining the quality, precision, and dependable operation expected from Brembo motorcycle components.
Installation may require additional components and application-specific preparation. The fluid reservoir and mounting bracket are sold separately, allowing the system to be configured to match the motorcycle and preferred cockpit layout. The universal brake light and clutch safety switch will require modification to work with Harley-Davidson models. Confirm handlebar, hydraulic, switch, and mounting compatibility before installation. Brembo part number 110A89770 is a practical upgrade for riders seeking adjustable clutch response and enhanced control without sacrificing everyday usability.

Features:

• Adjustable RCS response: Switch between a stronger, more direct clutch feel and a smoother, more progressive response.

• Radial master cylinder design: Provides precise hydraulic control and improved lever feedback for refined clutch operation.

• Performance-focused control: Supports smoother engagement, controlled starts, and confident gear changes.

• Handlebar compatibility: Designed for motorcycle applications using one-inch handlebar controls.

• Universal safety switch: Clutch safety switch requires modification for compatibility with Harley-Davidson models.

• Separate components: Fluid reservoir and mounting bracket are sold separately for application-specific installation.

• Brembo quality: Delivers the precision, adjustability, and performance associated with the Brembo RCS system.