Rear Hydraulic Brake Master Cylinder Caliper Assembly for 50cc 70cc 90cc 110cc 125cc ATV Quad Go Kart

Upgrade your ATV’s braking system with this high-quality RedCap Rear Brake Master Cylinder and Caliper Assembly, compatible with Boulder B1, Coolster CY125ATV-1, TaoTao, Kazuma, SunL, Peace Motorsports, and more 50cc–125cc Chinese 4-stroke ATVs. Designed for consistent performance, the master cylinder maintains precise brake fluid pressure to ensure smooth, responsive braking in all riding conditions. Whether navigating rocky trails or cruising open fields, this assembly delivers enhanced stopping power and greater control. The corrosion-resistant components are built to withstand heat, moisture, and heavy use—ideal for rugged outdoor adventures or daily riding.

This complete set includes a precision-machined master cylinder, high-durability brake hose, and a heavy-duty caliper for optimal braking efficiency. The advanced caliper ensures even brake pad wear and maximized grip on the rotor, while the reinforced hose maintains fluid integrity over time. Engineered for easy installation, it fits directly onto Coolster CY125ATV-1 and similar models without the need for modification. From steep descents to tight corners, this rear brake assembly gives riders the confidence to ride safely with dependable, long-lasting performance.

• Perfect Fit: Precisely engineered to fit Boulder B1, Coolster CY125ATV-1, and other 50cc–125cc Chinese ATVs, this rear brake master cylinder and caliper assembly delivers a snug and secure fit without the need for modifications, ensuring reliable performance and seamless compatibility right out of the box.
• Wide Compatibility: This brake assembly is compatible with a wide range of ATVs, including TaoTao, Kazuma, SunL, Peace Motorsports, Roketa, Apollo Focus 125, Icebear, Lifan, Buyang, Redcat, and more. Whether you're replacing worn parts or upgrading, this unit works with most 4-stroke Chinese ATV models from 50cc to 125cc.
• Enhanced Performance: Delivering strong, consistent braking power even on steep descents and rough terrain, this assembly enhances rider safety and control. The precision master cylinder ensures optimal fluid pressure, while the caliper applies even force to the pads, reducing wear and offering confident stopping power.
• Durable Construction: Crafted from high-grade, corrosion-resistant materials, the master cylinder and caliper are built to withstand heat, mud, dust, and moisture. The premium brake hose resists abrasions and punctures, ensuring reliable fluid flow and extending the life of your braking system under all riding conditions.
• Easy Installation: Designed for DIY enthusiasts and mechanics alike, this complete rear brake kit installs easily with standard tools and mounts directly onto compatible ATV frames. With pre-drilled mounting points and a user-friendly design, it simplifies installation, saving time and effort without compromising safety.

Specs:

• 1 x Master Cylinder
• 1 x High-Quality Brake Hose
• 1 x Durable Brake Caliper

Known to Fit:

• Rear Disc Brake Master Cylinder Caliper with Replaced Disc Brake Pad for 50cc 70cc 90cc 110cc125cc Chinese TaoTao Boulder B1, Peace 110B/125D, Coolster 3050HD 3050C 3125R 3050D 3125X R8, Apollo Focus 125, Peace Motorsports ATV, Vitai Hawk 110, KAYO BULL 125 PAK125-3, Roketa, Yamoto, RPS, Vitacci Rider, Icebear 110, MotoTec 110, Rock 110, Baja, Kazuma, Lifan, Buyang, Electra, Coolsport, AIM-EX, Panther, Redcat, MDI, Eagle Kids ATV 4 Wheeler

Note: This OEM charger is ideal as a replacement or as a spare since it fits many 24V scooters. Please check out the detailed pictures to make sure you have the correct plug-in.