JAVIK Front Brake Master Cylinder for Polaris ATVs — Direct-Fit Aluminum, OEM Replacement (2050073/2050062)

This JAVIK front brake master cylinder is a direct-fit replacement for many Polaris ATVs, engineered to restore reliable front braking using OEM-equivalent parts and mounting.

If your Polaris ATV is showing soft lever feel, leaking fluid at the master cylinder, or reduced front brake performance, replacing the master cylinder with a compatible unit can return crisp, dependable braking. This JAVIK assembly matches multiple Polaris OEM numbers, is machined from high-strength aluminum, and accepts inverted-flare brake lines used on many models from the late 1980s through 2000. The package contains one front brake master cylinder; brake line fittings, hardware, and instructions are not included, so verify fitment and have basic tools ready for installation.

Which Polaris models and years will accept this master cylinder?

This master cylinder is designed to fit a broad list of classic Polaris ATVs. Confirm your OEM reference before ordering to ensure compatibility.

• Compatible models include Big Boss, Trail Boss, Trail Blazer, Scrambler, Magnum, Sportsman, Sport, Xplorer, and several ATV 300/400L variants.
• Covers model years from 1987 through 2000 for specific trims noted in the fit list.
• See the detailed fitment list (below) for exact year/model pairings to avoid ordering the wrong part.

How do I verify this is the correct replacement for my OEM part?

Match the OEM number stamped on your original master cylinder or consult your Polaris parts fiche. JAVIK lists several direct and replacement OEM numbers that correspond to this unit.

• Direct OEM numbers: 2050073, 2050062, 2050055, 2050066, 2050045.
• Replacement references: 1930622, 1930647, 1930651, 1930682, 2050046, 2050050, 5130772, 5630312.
• If numbers match any of the above, this unit is likely the correct swap; otherwise consult a dealer or parts diagram.

What are the build details and installation considerations?

The JAVIK master cylinder is constructed from high-hardness aluminum for strength and corrosion resistance, and it accepts inverted-flare brake lines typical of the covered Polaris models. Installation is straightforward for anyone comfortable with brake work, but bleeding the system and checking for leaks are essential after fitting.

• Material: high-strength, high-hardness aluminum housing for durability.
• Brake line connection: inverted flare fitting—verify your hose ends match.
• Package includes one master cylinder; brake fluid, hoses, and mounting hardware may not be included.
• After install: bleed brakes fully and inspect for proper lever travel and no leaks.

What should I expect from JAVIK's support and warranty?

JAVIK provides a one-year warranty and around-the-clock customer service to address fitment questions or post-purchase issues. Reach out before installation if you need confirmation of compatibility or assistance with claims.

• Customer service: 24-hour messaging for troubleshooting and fit questions.
• Warranty: 1-year coverage on manufacturing defects—review warranty terms for exclusions.
• Returns or replacements typically require photos and proof of purchase for claims processing.

Who this is for: ATV owners and mechanics restoring late-1980s to early-2000s Polaris machines who need a reliable, OEM-referenced front brake master cylinder. Choose this JAVIK unit if your OEM number matches one of the listed references, you require an aluminum-bodied replacement that works with inverted-flare brake lines, and you or your technician can perform brake-system bleeding and safety checks after installation.

Fitment list (summary): Big Boss 250 (1989–1993), Big Boss 350 (1993), Big Boss 400 (1994–1997), Big Boss 500 (1999), Magnum 425 (1995–1998), Scrambler 400 (1995–2000), Scrambler 500 (1997–2001), Sport 400L (1994–1999), Sportsman 400 (1993–1997), Trail Blazer 250 (1990–2000), Trail Boss 250 (1987–1999), Trail Boss 350L (1990–1993), Trail Boss 325 (2000), Xplorer 250 (2000), ATV 300/400L (1994–1995).