JAVIK Front Brake Master Cylinder for Polaris ATVs 2050078 — Aluminum, Banjo Fit

Heavy‑duty aluminum front brake master cylinder engineered to replace OEM 2050078 on compatible Polaris ATVs for reliable braking performance.

If your Polaris ATV needs a direct replacement master cylinder, the JAVIK 2050078 front brake master cylinder offers a durable, corrosion‑resistant aluminum assembly that fits a wide range of Sportsman, Xplorer, Magnum, Big Boss, Worker and Xpedition models. It’s designed as a bolt‑in solution using banjo‑type brake line fittings and matches OEM reference numbers for straightforward identification before purchase.

Which Polaris models does this master cylinder fit?

This JAVIK unit is made to match the fitment pattern of multiple Polaris ATVs from the mid‑1990s through 2001. Confirm your vehicle’s year and OEM part number before ordering to ensure compatibility.

• Common fits: Sportsman 500 (1996–2001), Sportsman 335 (1999), Magnum 325/500 (1999–2000).
• Also fits: Xpress 300/400 (1996–1999), Xplorer 300/400/500 (1995–2000), Big Boss 500 (1998).
• Other matches: Worker 335/500 (1999), Xpedition 325/425 (2000), Diesel 455 (1999–2000).

How does the material and construction affect performance?

The master cylinder is machined from high‑strength, high‑hardness aluminum to resist wear and corrosion commonly caused by outdoor use. That solid construction stabilizes brake fluid pressure and reduces the chance of deformation under load compared with lower‑grade metals or plastics.

• Aluminum body: improved strength and heat dissipation.
• Precision porting: consistent hydraulic response and less fluid leakage risk.
• Banjo‑fitting compatible: connects to common Polaris brake lines without adapters.

What OEM numbers and replacement references should I check?

Match your current master cylinder’s stamped or printed part number to avoid buying the wrong item. JAVIK’s 2050078 corresponds to several Polaris replacement references commonly found in service manuals and parts catalogues.

• JAVIK OEM: 2050078.
• Replacement references: 12050072, 5131146—verify against your vehicle paperwork.
• Tip: confirm the banjo fitting orientation and mounting hole spacing on your existing part.

What’s included and how difficult is installation?

The package contains one front brake master cylinder ready for installation; no printed instructions are included. Installation is typically straightforward for technicians or experienced DIYers familiar with ATV brake systems, but always follow torque specs and bleed the brake lines after fitting.

• Package: one front brake master cylinder, no manual.
• Brake line type: banjo fitting (ensure compatible hoses/bolts).
• Recommended: replace seals/banjo bolts and bleed the system after mounting.

Who is this for: This JAVIK master cylinder is aimed at Polaris owners, mechanics and restoration specialists needing a durable, OEM‑matching front brake master cylinder for late‑1990s to early‑2000s ATV models. If you value a metal replacement that restores firm braking feel and matches factory references (2050078 / 12050072 / 5131146), this unit is a practical, cost‑effective choice. JAVIK provides 24‑hour customer service and a one‑year product warranty for added confidence—contact them if you encounter fitment or performance questions.