Loved by racers worldwide, the Accossato 17PRS radial brake master cylinder for sportbikes features a folding, short length lever or folding, standard length RST lever. The forged aluminum cylinder is stronger and lighter than stock cast units for maximum reliability. The variable lever ratio of the 17PRS makes it the perfect option for motorcycles with a double disc brake rotor setup since it allows the rider to tune up or down the brake feel and response to meet their individual riding style. Accossato has been producing Italian made sportbike components for original and aftermarket use since 1969.
This brake master cylinder has the revolutionary Accossato PRS system which allows the rider to make tool-free adjustments of the lever center distance selecting between the moderate (17 mm), firm (18 mm), or most responsive (19 mm). The advantage of the Accossato PRS comes from the relationship of the piston which is kept "in-axis" (meaning on a "straight line") as it acts on the position of the fulcrum during all lever adjustments. For this reason, the power of the Accossato PRS 17x-17-18-19 is an upgrade over other variable distance master cylinders. This technology was invented by Accossato, is not found on the RCS, and guarantees a more precise, immediate, and powerful feel with reduced wear on the internal gasket, piston, and cylinder wall.
This brake master uses a 17 mm diameter piston and a upgraded racer's folding, short length lever or folding, standard length RST lever. The short lever is a popular choice for riders campaigning Yamaha R6 and Yamaha R1 sportbikes who have smaller hands or wish for the lever to be accessed easily towards the center of the bike and for stunt riding.
Accossato produces race-quality master cylinders and braking components using a 100% quality-control process mandating all core components to be inspected under a microscope before assembly, pressure calibrated, and vacuum tested upon final assembly.
Folding lever: (adjustable) 19 mm x 17 mm (track use), 19 mm x 18 mm, 19 mm x 19 mm.
Material: Pressure-forged aluminum.
Piston: 17 mm.
Disc application: Double.
Surface protection: Anodized.
Exclusive Three (3) year limited U.S.A. warranty.
Items Required to Complete Installation:
Accossato suggests using the Accossato 30 ml Brake Reservoir Mounting Kit (P/N ACC-KITVG; sold separately) as it includes a reservoir, bracket, hardware and tubing.
The 17PRS includes a double hole banjo bolt with three copper washers. This will work if you have two brake lines coming off the master cylinder. If you only have one line off the master you will need a M10x1.0 Single Hole Banjo Bolt (P/N: ACC-MS2365; sold separately).
If you wish to retain brake light functionality you will require a Double Hole Inline Brake Light Pressure Switch Banjo Bolt (P/N: ACC-ID002; sold separately).
If you intend to use your stock reservoir you will require a length of 6 mm Tygon 2375 Tubing and 2-3/8" Spring Clamps (all sold separately).
Dot 4 Brake fluid will be needed. Accossato suggests replacing all of the fluid in the system when you install the master.