M MATI Left Front Brake Master Cylinder for Polaris ATVs — Direct Replacement Part #2010197, Fits 300–500 Models

M MATI Left front brake master cylinder is an aftermarket replacement designed to restore braking control on compatible Polaris ATVs by matching the original function for left-front hydraulic brake circuits.

This left-front brake master cylinder (Manufacturer Part # 2010197) is an aftermarket unit made to fit a wide range of Polaris all-terrain vehicles from the late 1980s through the early 2000s. Built from durable materials, the assembly is intended as a direct replacement for worn or leaking master cylinders and supports flare-type brake lines. Before purchase, verify your ATV model and year against the fitment list to ensure compatibility.

Which Polaris models and years will this master cylinder fit?

This master cylinder fits many Polaris ATV models across multiple years including Trail Boss, Big Boss, Trail Blazer, Magnum, Scrambler, Sportsman, Sport, Xplorer, and several 300/400 variants. Compatibility covers model ranges from 1987 up through 2002 for selected units—always confirm year and model against the provided fitment list.

• ATV 300 (1994–1995) and ATV 400L (1994–1995)
• Big Boss (1989–1999), Trail Boss (1987–2001), Trail Blazer 250 (1990–2002)
• Magnum 425 (1995–1998), Scrambler 400/400L/500 (1995–2002)
• Sportsman 400/400L (1993–1997), Xplorer 250 (2000–2001)

How does this replacement compare to the original Polaris part?

The M MATI replacement is an aftermarket part that restores the same mechanical function as the original master cylinder, though external appearance may differ. It is designed for the same flare-style brake line fittings and provides the hydraulic pressure needed for reliable left-front braking performance.

• Manufacturer Part # 2010197 corresponds with several OEM cross-reference numbers.
• Works with flare brake lines and standard hydraulic brake systems used on listed Polaris models.
• Externally different finish but engineered to replicate original function and fit.

What are the materials and build quality features?

The unit is constructed from corrosion-resistant metals and seals suited for brake fluid exposure, intended to provide long service life under normal ATV use. Quality control for aftermarket units varies, so inspect the part on arrival and follow torque and bleed procedures during installation.

• Durable housing and machined ports for secure hose connections.
• Seals compatible with standard brake fluids (follow vehicle manufacturer recommendations).
• Supplied as a complete left-front master cylinder assembly for direct swap-in replacement.

What should I check before ordering and during installation?

Confirm that your vehicle model and year appear in the fitment list and compare any OEM part numbers you have to the cross-references provided. During installation, use correct brake fluid, bleed the system properly, and inspect for leaks and proper pedal feel before riding.

• Compare your old part number to 2010197 and listed replacement cross-references.
• Ensure correct flare fittings and tighten to specified torque values.
• Bleed brakes thoroughly after installation and test on a safe surface.

Who is this for: This M MATI left front brake master cylinder suits DIY mechanics, restoration enthusiasts, and maintenance technicians working on compatible Polaris ATVs who need a cost-effective aftermarket replacement. It’s aimed at owners of older Polaris machines where original parts may be worn or unavailable, providing a direct-fit option to restore braking function when installed and bled correctly.