FVRITO Rear Brake Master Cylinder & Caliper Assembly for 50–125cc ATVs — Black, Complete Kit with Hose & Spare Pad

FVRITO's rear brake master cylinder and caliper assembly is a complete replacement kit designed to restore stopping performance on 50cc–125cc Chinese ATVs and mini quads.

If your ATV's rear brake is spongy, leaking, or missing components, this all-in-one assembly bundles the master cylinder, caliper, hoses, an extra pad, cable ties and a fuel filter so you can install a functioning brake system quickly. Engineered to match mounting patterns used by many popular Chinese makes and models, the assembly reduces the hassle of sourcing individual parts and provides the essential dimensions to confirm fitment before purchase.

Which vehicles will this rear brake assembly fit?

This kit is made to suit a wide range of 50cc through 125cc Chinese ATVs, quads and mini 4-wheelers. It lists compatibility with Taotao, Coolster, Kazuma and many other common brands, but you should verify hole spacing and mounting details for a final fit check.

• Common fits: Taotao Boulder B1, Coolster 3050C/3125R series, Kazuma 125, Apollo and similar models
• Engine sizes covered: 50cc, 70cc, 90cc, 110cc, 125cc
• Brands included: Roketa, Sunl, MotoTec, ICEbear, Baja, KAYO, Lifan and more
• Recommendation: measure mounting holes and hose routing before ordering

How do the dimensions and connections match my ATV?

The assembly provides key measurements so you can confirm compatibility without guesswork. Knowing these dimensions helps ensure proper alignment with your frame and rear wheel brake mounts before installation.

• Brake cylinder mounting hole distance: 42–50 mm (1.65–1.97 in)
• Brake caliper mounting hole distance: 63 mm (2.48 in)
• Brake oil hose length: 600 mm (23.62 in)
• Includes one extra brake pad and three cable ties for routing

What is included in the package and what tools will I need?

The kit arrives with most items needed to swap out a rear brake system, reducing the number of individual parts to source. Basic hand tools and a few installation supplies will complete the job depending on your machine’s layout.

• Package: 1 brake assembly, 3 cable ties, 1 spare brake pad, 1 fuel filter
• Typical tools: metric sockets/wrenches, screwdriver, bleed kit or tubing, brake fluid
• Extras recommended: thread locker, shop rags, torque wrench to OEM specs
• Note: brake fluid and bleeding procedure are not included—follow manufacturer guidance

How does this assembly help with common brake problems?

Replacing a worn or leaking master cylinder and caliper with a matched assembly eliminates multiple failure points at once. The refreshed seals, mounting points and included hardware restore hydraulic pressure and improve pedal feel when properly bled and installed.

• Fixes leaks by replacing seals and hose connections
• Improves braking firmness when bled correctly
• Speeds repair time by supplying matched components together
• Includes an extra pad to extend service life right away

Who is this for? This rear brake master cylinder and caliper assembly is aimed at owners, small repair shops and DIY mechanics who maintain Chinese-brand ATVs and mini quads in the 50–125cc range. It suits riders who need an affordable, direct replacement package that matches common mounting dimensions—especially if the current rear brake is damaged, leaking, or missing parts. Before buying, compare the listed hole distances and hose length with your machine to ensure a proper fit; contact the seller with your model details if you need clarification.