MAD HORNETS Rear Brake Master Cylinder for Kawasaki Ninja ZX6/ZX7 (1989–2014) 14mm Reservoir, Complete Pump

MAD HORNETS rear brake master cylinder pump is a direct-fit, brand-new replacement engineered to restore braking feel and reliability on Kawasaki Ninja models from 1989–2014.

If your rear brake lever feels soft, spongy, or the original master cylinder is leaking or worn, this MAD HORNETS assembly offers a ready-to-install option built from metal and durable plastics. It’s designed specifically for a wide range of Kawasaki Ninja sportbikes—models ZX6, ZX7, ZX6R, ZX6RR and ZX7R—covering years 1989 through 2014. The unit includes a 14mm reservoir piston and arrives as a complete pump so you can replace the faulty part quickly and get back on the road with consistent brake response.

Will this master cylinder fit my Ninja model and year?

Yes—the pump is specified to fit Kawasaki Ninja ZX6, ZX6R, ZX6RR, ZX7 and ZX7R models built between 1989 and 2014 when the rear master cylinder uses a 14mm piston. Verify your OEM part dimensions and mounting points before purchase to ensure compatibility with your bike's rear brake linkage.

• Compatible models: ZX6, ZX6R, ZX6RR, ZX7, ZX7R
• Year range: 1989–2014
• Reservoir piston diameter: 14mm
• Check mounting holes and brake line port match OEM

What materials and build quality can I expect?

The MAD HORNETS pump combines metal components for structural parts with high-strength plastic where appropriate to balance durability and corrosion resistance. It’s a brand-new aftermarket unit manufactured to withstand normal riding conditions and daily use, offering dependable operation when installed correctly.

• Construction: metal and engineering-grade plastic
• Finish: black color for a discreet OEM-like appearance
• New, not remanufactured—ships complete and ready to install
• Factory-tested for proper fit and basic function

How easy is installation and what’s included in the package?

Installation is straightforward for anyone familiar with motorcycle brake maintenance: remove the old master cylinder, swap the brake line and mounting bolts, then bleed the system to remove air. The product ships as a single rear brake master cylinder assembly so you receive the necessary pump without extra unrelated parts.

• Package includes one rear brake master cylinder pump
• Requires common hand tools and brake-bleeding supplies
• Recommended: replace seals and fresh DOT-spec brake fluid during installation
• Professional installation advised if you’re not experienced with brake systems

How will this change rear brake performance?

Replacing a worn or leaking master cylinder restores consistent lever feel and predictable pressure transfer to the caliper, improving control during deceleration. While results depend on the entire brake system condition—pads, rotor, lines—installing a tight, properly bled master cylinder is a key step toward reliable rear braking.

• Improved lever firmness and pressure response
• Reduces fluid leaks and air ingress when properly sealed
• Helps maintain consistent stopping power under normal riding
• Works best alongside well-maintained pads, rotor, and lines

Who is this for: This MAD HORNETS rear brake master cylinder pump is intended for Kawasaki Ninja owners and mechanics who need a brand-new replacement for a faulty or aged rear master cylinder. It suits riders restoring, repairing or upgrading ZX6/ZX7-series bikes from 1989 through 2014 who want a cost-effective, direct-fit aftermarket option that matches OEM-style dimensions and requires routine installation and brake-bleeding procedures.