Aynaxcol Left Rear Hydraulic Brake Caliper Assembly for 50–150cc ATVs — Includes Lever and 59in Hose, Direct-Fit Replacement

Aynaxcol left-hand rear hydraulic disc brake caliper assembly replaces worn or damaged stock units on many Chinese-made 50cc–150cc ATVs, quads, go-karts and mini bikes.

This replacement rear hydraulic brake system from Aynaxcol is engineered as a direct-fit aftermarket option for a wide range of Chinese-brand small-displacement vehicles such as Taotao, Roketa, Sunl, Baja-style quads and similar models. It includes the caliper, lever and a long hose to suit machines using a left-hand brake, and it matches common mounting dimensions and part numbers used by many manufacturers.

Will this caliper fit my ATV or mini bike?

Compatibility is designed around common dimensions and popular Chinese ATV models. Check your vehicle’s mounting hole spacing and hose routing to confirm a match before buying.

• Intended for many Chinese 50cc–150cc ATVs, quads, go-karts, dirt bikes and mini bikes.
• Replaces part number 256878 on compatible machines.
• Mounting hole diameter: 7/8 inch (22 mm); center-to-center distance: 2.5 in (63 mm).
• Brake hose length: 59 in (1500 mm); brake lever length: 7.8 in (200 mm).

How simple is installation and what hardware is included?

Installation is straightforward for anyone familiar with basic brake plumbing and mounting. The unit arrives mostly assembled; you’ll typically need standard hand tools, thread sealing for fittings, and a short bleed procedure to remove air from the line.

• Package contains one complete rear hydraulic disc brake caliper assembly.
• Requires common hand tools (wrenches, hex keys) and brake fluid for bleeding.
• Expect a brief brake-bleeding step and torqueing to the vehicle manufacturer’s specs.

What durability and performance details should I expect?

The caliper is built to handle everyday trail and street use typical of small-displacement ATVs and dirt bikes. It’s a practical replacement option that restores hydraulic braking function and lever feel when the original component is leaking, seized or otherwise compromised.

• Hydraulic design provides consistent lever pressure and modulation.
• Hose length allows flexible routing to many vehicle frames and master cylinders.
• Robust cast/forged housing resists common wear from dirt and light impacts.

Are there special maintenance tips or safety checks I should know?

Routine inspection and maintenance keep the brake performing safely. Always test braking in a controlled setting after installation and after any brake work.

• Bleed to remove air and top up with manufacturer-recommended brake fluid.
• Inspect hose fittings and mounting bolts for proper torque and leaks.
• Check pad thickness and rotor condition; replace pads if worn before use.

Who is this for: This Aynaxcol left-hand rear hydraulic disc brake caliper suits owners of Chinese-manufactured 50cc–150cc ATVs, quads, go-karts, dune buggies and mini bikes who need a reliable, direct-replacement brake assembly. It's targeted at riders doing repairs or upgrades who can perform basic mechanical tasks like mounting, connecting brake lines and bleeding the system, and who want a compatible aftermarket option for models from Taotao, Roketa, Sunl and similar brands.