14RCS  is designed for single disc applications. ( Standard Lever,Folding levers are available) 
1) If you are not sure you should buy the Brembo 14 RCS, please contact us first.

2) Adjustable pivot distance: RCS system
    Rider can set the brake lever pivot point at one of two distances: 18 or 20 mm
    Adjustment is simple, by turning a roller cam located on the front of the lever clevis.
3) MOTO GP piston assembly:
     The piston, seals and push-rod are the same as those of master cylinders used by all riders in MotoGP and World Superbike.
4) Master cylinder body construction:
     The body of the master cylinder is an aluminum alloy forging, machined on CNC equipment with weight-relieved by milling.
     Surface Finish: Hard anodization (Ultra-hard oxide)

     This durable film affords especially high resistance to abrasion and corrosion.
5) Brake lever features:
      The brake lever is made up of two main components: the Racing Lever Clevis, and the lever itself, forged and hinged to the clevis.
      The clevis incorporates a patent system allowing angular movement only in the event that the bike should happen to fall or crash.
      This prevents the lever from rotating accidentally, and provides increased dynamic safety.
      The lever is hinged to the cylinder body by way of a precision pin and bush assembly, guaranteeing optimum rigidity, better feel and especially high resistance to wear.
6) Brake light switch:
      A housing has been included specifically to accept the mechanical switch of a brake light circuit, when the 14 RCS is set up for street use.
      A Brake light switch is included in the Spears Racing Brembo 14 RCS Kit.

 By meticulously selecting the materials used, Brembo can achieve ever higher standards in terms of technology and quality, which translate to superlative performance  and outstanding reliability and safety. The technological innovations developed and implemented in the world's major motorcycle championships are continuously  transferred to the racing products range, which offer bike tuners technologically dedicated, highly advanced solutions.
These products make the benefits of Brembo's extraordinary wealth of technical expertise available to owners who want to enhance the character and performance of  their motorcycles with track-proven components.

Kawasaki EX300 Ninja 2011+ only

Brembo RCS radial brake master cylinders allow the rider to choose between power or precision in relation to road conditions, the weather, personal preference for feel and familiarity with the bike. This patented master cylinder, derived directly from the unit used in MotoGP, features an innovative adjustment system that allows the same master cylinder to cater for the many different requirements of even the most exacting customer.

Created specifically to bring MotoGP and Superbike technology to countless enthusiasts, the Brembo RCS radial master cylinder sets new standards for high performance brake components in terms of technology and style.

Brembo - Entry Level Sportbike Axial Caliper To Fit Kawasaki Ninja 250/300

Cast aluminum 2 piece calipers with 2x34mm & 2x30mm pistons
Paint coated finish
Fits Kawasaki Ninja 250 only if using OE rotor
Fits Kawasaki 300 if using Brembo rotor 108.9737.49
Also available in billet aluminum part number 120.B765.20

World Supersport winning kits for the street. These fully homologated for the street rotors have performed at the highest level in World Supersport and dominated the class outperforming any other competitors rotors on many occasions. 

High Carbon stainless steel.
5.5mm thickness with a 34mm wide friction surface.
CNC machined aluminum carrier.
Available for all current European and Japanese sport bikes.
May require spacers when upgrading to an oversized rotor.

This will fit your Kawasaki EX250/300cc , Yamaha R-3. This is designed for the stock brake caliper/single disc.