CNCMOTOK Rear Brake Master Cylinder 10mm for 50cc-125cc ATVs | Hydraulic Foot Brake

Upgrade your ATV braking with CNCMOTOK

The CNCMOTOK Rear Brake Master Cylinder in a 10mm size is designed for 50cc-125cc ATVs, delivering a refined, hydraulic braking experience. Built to support popular Chinese models, including Coolster, Taotao, BMS, and Roketa, this unit offers a practical option for upgrading rear braking without a full system swap. Its compact form fits into tight engine bays, while the robust construction stands up to regular riding and weather exposure.

What makes this master cylinder appealing

Hydraulic actuation translates rider input into smooth, consistent pressure at the rear caliper. The result is more predictable braking feel, helping you modulate speed on uneven trails or in tight parking maneuvers. The included 0.4 inch (10 mm) banjo bolt matches standard brake line fittings, reducing the chance of loose connections or compatibility issues during installation.

• Smooth hydraulic action for refined rear brake control
• Standard 10mm banjo bolt for straightforward connection
• Direct-fit mounting with compatible hole layout (verify before purchase)
• Supports reliable rear caliper operation and modulation
• Durable, lightweight design suited for ATV environments

Compatibility and installation tips

Before purchasing, measure your original part’s mounting hole spacing and confirm the 10mm banjo bolt size. This helps ensure a compatible fit with your ATV’s rear brake line and caliper. If you are unsure about the fit, consult your vehicle manual or a qualified technician. A proper install is key to achieving the best possible braking feel from this upgrade.

Note that this product offers potential improvements in rear braking performance, depending on your existing brake system and maintenance. It is an upgrade component rather than a guaranteed outcome, and successful results rely on correct installation and compatible components.