Product information
The Brembo 110A89710 is a radial brake master cylinder 19 RCS (Ratio Click System) specifically designed for 1-inch (25.4 mm) handlebars. It is a high-performance component derived from MotoGP, designed for Custom, Cruiser, and Café Racer motorcycles.
The absolute uniqueness of this model is the enlarged clamp for 25.4 mm (1") handlebars, the standard for the vast majority of American and European custom motorcycles (while traditional sports bikes use 22 mm handlebars).
• RCS (Ratio Click System): Allows you to vary the lever distance in two positions by simply rotating a front eccentric register:
• 19x18 Configuration (Red Dot): Makes braking more modulable and powerful, ideal if you seek feel and progressivity.
• 19x20 Configuration (Black Dot): Reduces the lever's free travel, making the brake response more prompt, reactive, and aggressive.
• 19 mm Piston: The ideal size for powering dual front disc systems.
• Materials: Forged aluminum pump body CNC machined with hard anodized finish for maximum resistance.
• Folding Lever: The lever is equipped with an anti-return joint to prevent pump breakage or damage in case of a fall.
• Included Accessories: Comes complete with a hydrostop (mechanical micro switch) to keep the rear stop light functioning.
This pump has a universal application, meaning it is not designed for a single specific model and year, but can be mounted on any motorcycle equipped with dual front disc brakes and a 1-inch (25.4 mm) handlebar.
It is the absolute reference choice for the following brands and segments:
• Harley-Davidson: Fits perfectly on almost the entire range (e.g., Sportster, Dyna, Softail, Touring) from the '80s to the most recent models, as long as they are equipped with dual front discs.
• Triumph Custom & Modern Classics: Models like the Thunderbird 1600/1700 or modified Bonneville/Bobber with dual disc front end and one-inch handlebars.
• Custom, Naked, Café Racer, and Bobber motorcycles of any brand (Honda, Yamaha, Kawasaki, Suzuki, Indian) using oversized 1" handlebars and split front braking systems.
Important mounting notes:
1. Fluids: Works exclusively with DOT 4 brake fluid (never use mineral oils).
2. Electronic Systems: It is perfectly compatible with ABS systems but is not compatible with the original Cruise Control commands mounted on the handlebars of some recent Harley-Davidsons, due to the micro switch's encumbrance.