JAVIK Left Front Brake Master Cylinder for Polaris ATVs – 3/4" Bore, 19mm Piston (OEM 2010238 Compatible)

JAVIK’s Left Front Brake Master Cylinder is a direct-fit replacement designed to restore reliable front braking on compatible Polaris ATV models.

If your Polaris ATV’s left front brake has become spongy, unresponsive, or is leaking around the original master cylinder, this JAVIK assembly is manufactured to match OE specifications for fit and function. It replaces OEM# 2010238 and is compatible with many Polaris Sportsman, Scrambler, Magnum, Trail Blazer, Xpedition, Xplorer, ATP and other listed models and model years. The unit features a 3/4" bore with a 19mm piston and a 10x1mm banjo bolt fitting for standard 7/8" handlebars, making it a practical option for technicians and DIY owners seeking a straightforward swap.

Which Polaris models and years will this master cylinder fit?

This JAVIK part covers an extensive list of Polaris ATVs across several generations. It fits numerous Sportsman models (including 335, 400, 450, 500, 600, 700, 800 ranges), Scrambler and Magnum series, Trail Blazer variants, Xpedition and Xplorer models, plus selected ATP, Forest, LUH, PTV, Big Boss and Xpress rigs. Always cross-check your OEM number and year to confirm compatibility before purchasing.

• Replaces OEM# 2010238; compatible with OEM replacements 2010196, 2010233, 1910684, 2050078, 2050072
• Fits Sportsman 335/400/450/500/600/700/800 (various years listed in product details)
• Also fits Scrambler 500, Magnum 325/330/500, Trail Blazer 250/330/400, Xpedition and Xplorer models
• Applicable to ATP 330/500 4x4 models, select Forest/LUH/PTV configurations

How does this master cylinder compare to the original equipment part?

The JAVIK assembly is engineered to meet the critical dimensions and fluid pathway requirements of the OEM item so it installs with the same routing and hardware interfaces. Materials and machining are chosen to provide consistent hydraulic pressure transfer and minimize leak points, while the 19mm piston and 3/4" bore yield braking performance aligned with factory expectations.

• Exact bore size: 3/4" with a 19mm piston for original-style feel
• Standard 10x1mm banjo bolt port for brake line compatibility
• Designed for 7/8" handlebar master cylinder mounts
• Manufactured to replace listed OEM reference numbers

What comes in the package and is installation difficult?

The box contains one left-hand front brake master cylinder ready for installation. No printed manual is included, but the unit is intended as a like-for-like replacement—plumbing and mounting points match the OEM layout so installation is generally straightforward for anyone with basic mechanical skills and standard hand tools.

• Included: Left front brake master cylinder x1
• Not included: installation manual, brake fluid, banjo bolt or copper washers (verify local kit requirements)
• Installation notes: bench-bleed and then bleed the brake system after fitting
• Support: JAVIK provides 24-hour customer service and a 1-year warranty

What maintenance or precautions should I follow after fitting this part?

After installation, follow standard brake plumbing and break-in procedures: use the correct DOT brake fluid specified by Polaris, ensure all connectors are torqued to spec, and bleed the system to remove air. Periodically inspect the master cylinder and connections for leaks or seepage and monitor pedal or lever feel during initial rides.

• Use manufacturer-recommended brake fluid; avoid contamination
• Torque banjo bolt and fittings to OEM specifications with fresh copper crush washers
• Bleed fully to remove trapped air for consistent braking
• Check for leaks and lever firmness after first few uses

Who is this for: This JAVIK left front brake master cylinder is aimed at Polaris ATV owners, mechanics, and restoration specialists who need a dependable replacement part that matches OEM dimensions and performance. It’s suited for riders repairing older Polaris machines where original units are worn, leaking, or no longer provide firm braking. If you want a direct-fit hydraulic component with warranty-backed support and clear fitment to many Sportsman, Scrambler, Magnum, Trail Blazer, Xpedition, Xplorer and ATP models, this assembly is a practical, cost-effective option.