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Loved by racers worldwide, the Accossato 15PRS radial brake master cylinder for sportbikes feature a forged aluminum cylinder which is stronger and lighter than stock cast units for maximum reliability. The variable lever ratio of the 15PRS makes it the perfect option for motorcycles with a single 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 15x-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.
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) 15 mm x 17 mm (track use), 15 mm x 18 mm, 15 mm x 19 mm.
Material: Pressure forged aluminum.
Piston: 15 mm.
Disc application: Single.
Surface protection: Anodized.
The short length lever is a popular choice for riders who have smaller hands or wish for the lever to be accessed easily towards the center of the bike and for stunt riding.
The standard length RST lever features an anti-drag inlet hole machined into the lever end for the passage of air at high speed; this is a popular choice for track and race riders.
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 15PRS includes a single hole banjo bolt with two copper washers. This will work if you have one brake line coming off the master cylinder. If you only have a two line off the master you will need a M10x1.0 Double Hole Banjo Bolt (P/N ACC-MS2362; sold separately).
If you wish to retain brake light functionality you will require a Single Hole Inline Brake Light Pressure Switch Banjo Bolt (P/N ACC-ID001; 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. Do NOT use Dot 5.1.