Rear Brake Master Cylinder Pump For 110cc 125cc Pit Bike ATV SSR Coolster Taotao

Rear Brake Master Cylinder Pump for Pit Bike ATV

This rear brake master cylinder pump is a complete hydraulic assembly that converts pedal pressure into braking force for 110cc and 125cc pit bikes, ATVs, and similar small-displacement machines.

Overview

This rear brake master cylinder pump is built for riders running 110cc and 125cc pit bikes and ATVs who need a dependable replacement for a worn or leaking factory unit. The pump pushes hydraulic fluid through the rear brake line to engage the caliper, restoring consistent stopping power on the trail or track. It suits SSR, Coolster, Taotao, and other Chinese-built minis that share this common rear brake setup.

Built For Performance

• Hydraulic master cylinder design that converts pedal travel into caliper pressure
• Sealed reservoir to hold brake fluid and resist trail dust and moisture
• Cast body with machined bore for smooth piston travel
• Integrated mounting points that match common pit bike and ATV frame tabs
• Compatible with standard DOT brake fluid for straightforward bleeding and service

Fits These Machines

• for SSR 110cc pit bikes
• for Coolster 125cc pit bikes
• for Taotao 110cc and 125cc ATVs
• for 110cc and 125cc pit bikes using a rear hydraulic brake setup

On-The-Job Use

• Rear brake repair on pit bikes and minis used for trail riding
• ATV rear brake rebuilds on youth and entry-level machines
• Rebuilding project bikes that arrive with a seized or leaking rear master cylinder
• Track day spares for riders who want a spare pump on hand

Specs At A Glance

Good To Know

Q: Do I need to bleed the brakes after installing this pump? A: Yes, air must be purged from the rear brake line and caliper after installation to get a firm pedal and reliable stopping power.

Q: Will this fit any 110cc or 125cc pit bike? A: It fits many SSR, Coolster, and Taotao models, but mounting tabs and line fittings vary, so compare the old pump to this unit before ordering.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.