Front Brake Master Cylinder for Honda FourTrax TRX 125-350 1985-2000 ATV
Front Right Brake Master Cylinder Assembly | Aluminum Alloy Replacement for Honda TRX 125 200 250 300 350 400FW FourTrax ATV
📌 Product Overview
Restore safe, responsive braking performance to your Honda all-terrain vehicle with this premium front right brake master cylinder assembly, engineered as a direct fit replacement for a full range of TRX FourTrax ATV models. Machined from high-strength aluminum alloy with a durable black protective finish, this master cylinder withstands harsh off-road conditions, constant vibration and temperature extremes to deliver consistent, leak-free hydraulic brake operation.
This unit matches original factory mounting dimensions, 2.2cm installation bore and hydraulic specifications, enabling a straightforward bolt-on replacement with no drilling, welding or custom modifications required. It resolves common ATV brake failures such as spongy lever feel, brake fluid leakage, pressure loss and worn internal seals, bringing stopping performance back to factory-standard levels for trail riding, utility work and recreational off-road use.
✨ Core Key Features
🛡️ Heavy-Duty Aluminum Alloy Construction
- Precision-machined from high-grade aluminum alloy for exceptional structural rigidity, corrosion resistance and heat dissipation
- Black anti-corrosion finish protects against rust, mud, road grime and UV exposure for long service life in off-road environments
- Honed internal cylinder bore ensures smooth piston travel and consistent hydraulic pressure output
- Reinforced mounting flange resists cracking and fatigue from continuous off-road vibration and impact
🎯 Exact OEM Specification Direct Fit
- Replicates original factory dimensions, mounting hole spacing and 2.2cm installation bore for seamless drop-in replacement
- Designed for installation on the right front position of the vehicle, matching the factory handlebar / frame mounting layout
- Fully compatible with original ATV brake lines and standard DOT brake fluid
- No fabrication, adapters or permanent modifications required for installation
🚦 Stable, Predictable Braking Performance
- Precision internal piston and high-quality seal assembly delivers firm, linear brake lever feel
- Eliminates spongy brakes, pressure fade and fluid leakage caused by worn original master cylinder seals
- Maintains consistent hydraulic performance across temperature changes and extended heavy use
- Restores confidence-inspiring stopping power for safe operation on trails, work sites and recreation areas
🏍️ Broad Honda TRX Model Compatibility
- Covers multiple generations of Honda FourTrax utility ATVs spanning from the 1980s through the 2000s
- Ideal for ATV repair, restoration projects and routine brake system maintenance
- A cost-effective alternative to expensive OEM dealer replacement parts
- Matches the fit and function of the original factory master cylinder assembly
📊 Full Technical Specifications
| Parameter | Exact Details |
|---|---|
| Product Type | Front Right Brake Master Cylinder Assembly |
| Mounting Position | Right Front of Vehicle |
| Body Material | High-Grade Aluminum Alloy |
| Surface Finish | Black |
| Overall Dimensions | 24.5cm × 10cm × 8cm |
| Net Weight | 420g |
| Installation Bore Diameter | 2.2cm |
| Installation Type | Direct Bolt-On Replacement |
| Application | Honda TRX Series FourTrax ATV |
| Condition | 100% Brand New |
🚙 Complete Vehicle Fitment
Honda TRX FourTrax ATV Models
- TRX125 (base compatible model)
- TRX200: 1984
- TRX250: 1985 – 1987
- TRX300FW FourTrax 4×4: 1988 – 2000 (includes all A / AN / AC trim variants)
- TRX350: 1986 – 1989, 2004 – 2007
- TRX400FW FourTrax: 1995 – 2005
For front right brake master cylinder position only. Please confirm your ATV model, production year and original part dimensions before purchasing.
📦 Package Included
✅ 1 × Front Right Brake Master Cylinder Assembly
🔧 Installation Guide
- Safety preparation: Park the ATV on flat, level ground, engage the parking brake and support the vehicle securely. Disconnect the brake line from the old master cylinder and drain used brake fluid into an approved container following local waste disposal regulations.
- Remove original unit: Unbolt the factory master cylinder from its right front mounting bracket, and detach the brake lever and associated hardware as needed.
- Bench bleed the new cylinder: Pre-bleed the new master cylinder on a workbench before installation to remove trapped air from the internal chamber.
- Mount the new assembly: Bolt the new master cylinder into the factory mounting position, then reconnect and tighten the brake line fitting to the specified torque.
- Bleed the full brake system: Bleed air from the entire front brake circuit following standard ATV bleeding procedure, until the brake lever feels firm and consistent with no sponginess.
- Test before riding: Squeeze the brake lever repeatedly to confirm stable pressure, then test brakes at low speed in a safe area before normal off-road use.
Professional installation by a certified ATV mechanic is strongly recommended for safety and proper function.
⚠️ Important Usage Notes
- Fitment verification: Please confirm your ATV model, production year and original master cylinder specifications before ordering. When in doubt, compare your original part against the listed dimensions and bore size.
- Brake fluid requirement: Use only DOT-rated brake fluid compatible with your ATV. Always fully bleed the entire brake circuit after installation to eliminate all air bubbles.
- Routine maintenance: Inspect brake fluid level and master cylinder condition regularly. Clean the cylinder body after muddy or wet rides to prevent premature corrosion and seal damage.
- Safety warning: Defective brakes present a serious safety hazard. Do not operate the ATV until you have confirmed full, consistent brake function after installation.
- Seal care: Avoid using harsh solvents or petroleum-based cleaners on rubber seals, as this will cause swelling, degradation and premature seal failure.
✅ Rigorous Pre-Shipment Quality Inspection
Every brake master cylinder passes strict multi-point quality control before delivery:
- Appearance Check: Confirmed uniform black finish, free of casting defects, scratches, burrs and machining flaws; all ports and mounting holes with clean, intact threading
- Dimension Check: Verified overall size 24.5×10×8cm, 420g net weight, and 2.2cm installation bore meet specification
- Structure Validation: Confirmed solid aluminum alloy construction, precision honed internal bore, complete seal assembly and reinforced mounting points
- Pressure Test: Verified smooth piston travel with no binding; pressure holding test confirms zero internal or external fluid leakage
- Fit Check: Confirmed mounting geometry matches all listed Honda TRX FourTrax ATV applications
💬 Customer Satisfaction Guarantee
We are committed to providing high-quality ATV replacement parts and reliable customer service. All products pass strict quality inspection before delivery. We offer fast free shipping and a 60-day hassle-free return policy. If you have any questions about fitment, installation or product performance, please contact us through eBay messages anytime. Our dedicated team will respond promptly and help resolve any issues to your satisfaction.
