Brake Master Cylinder For Honda Fourtrax 300/foreman 450

OLIFANT's brake master cylinder is a direct-fit hydraulic lever assembly designed to restore reliable front/rear braking performance on a wide range of Honda ATVs.

This replacement master cylinder and lever assembly is engineered as a compatible substitute for many Honda FourTrax, Foreman, Rancher, Recon and Sportrax models spanning multiple years. It includes the lever, reservoir and mounting flange sized to match factory mounting points, making it a practical repair part to get an ATV back on the trail without extensive modification. Below you’ll find answers to common buyer questions, specifics about fitment and what to expect during installation.

Which Honda models and years will this OLIFANT master cylinder work with?

The OLIFANT unit covers a broad list of Honda ATVs from vintage FourTrax machines to modern Foreman and Rancher models. Fitment spans model years in the product’s compatibility list and corresponds to many OEM part numbers used by Honda.

• Foreman/Foreman Rubicon: TRX400, TRX450, TRX500, TRX520 series (1995–2024 variants)
• Rancher lineup: TRX350, TRX400, TRX420 (2000–2024 ranges)
• Sportrax/Recon and select ATC models: TRX250/300/400/650 and ATC 200/250/350 (1985–2008 range)
• Cross-references multiple OEM part numbers such as 45510-HM3-901 and related codes

How difficult is it to install and what tools will I need?

Installation is straightforward for anyone comfortable with basic ATV maintenance: remove the old master cylinder, swap fluid lines, mount the new unit, bleed the brake system and check for leaks. Expect to spend about 30–90 minutes depending on access and whether you’re replacing associated hardware.

• Required tools: wrench set, screwdriver, brake-bleeding kit or clear hose, catch container
• Optional: new banjo bolts and copper crush washers if original parts are corroded
• Safety tip: wear gloves and protect painted surfaces from brake fluid

What materials and design features affect durability and performance?

The assembly uses metal and composite components sized to match the original equipment geometry, providing the leverage and reservoir capacity expected from a factory unit. The lever action and piston response are tuned to deliver predictable hydraulic pressure when bled and installed correctly.

• Stamped or cast mounting flange for secure handlebar attachment
• Sealed piston and reservoir to resist contamination and fluid loss
• Pre-machined bore and lever pivot to align with factory linkages

Can I rely on this part to match OEM fit and part numbers?

OLIFANT provides this master cylinder as an aftermarket match to many OEM component codes listed in the compatibility section. While designed for direct replacement, some installations may require minor hardware swaps or reuse of factory fittings.

• Compatible with numerous OEM part numbers (see product compatibility list)
• Double-check your ATV’s year and model against the listed fits before ordering
• Contact a technician if your machine has custom brake routing or modified controls

Who is this for? This OLIFANT brake master cylinder is aimed at ATV owners, mechanics and restoration enthusiasts who need a reliable, cost-effective replacement for worn or damaged hydraulic brake masters on Honda FourTrax, Foreman, Rancher, Recon and Sportrax models. It suits riders restoring older machines as well as those maintaining daily-use utility ATVs who want factory-style fit and predictable brake lever feel without sourcing scarce OEM parts.