Left Front Brake Master Cylinder for Polaris Trail Boss 325 2002/ 330 2003-2013

Left Front Brake Master Cylinder for Polaris

This left front brake master cylinder is a direct-fit replacement assembly for Polaris Trail Boss 325 and 330 models, built to restore reliable hydraulic pressure at the front brake lever.

Overview

This brake master cylinder for Polaris Trail Boss 325 and 330 is the hydraulic control unit that converts lever pressure into fluid force at the front caliper. It is a practical replacement for a leaking, seized, or failed unit on 2002 Trail Boss 325 and 2003-2013 Trail Boss 330 models.

Built For Performance

• Bore and stroke sized to deliver consistent fluid displacement at the front brake lever
• Sealed reservoir and cap designed to hold brake fluid without weeping
• Bleed fitting and outlet port machined for a clean, leak-free line connection
• Lever pivot and pushrod interface set up for smooth, predictable actuation
• Cast housing built to withstand mud, dust, and repeated trail use
• Installs in the original mounting location with factory-style hardware points

Fits These Machines

• for Polaris Trail Boss 325 2002
• for Polaris Trail Boss 330 2003
• for Polaris Trail Boss 330 2004
• for Polaris Trail Boss 330 2005
• for Polaris Trail Boss 330 2006-2013

On-The-Job Use

• Replacing a master cylinder that has lost lever feel or is leaking fluid
• Restoring front brake function on a Trail Boss used for trail riding
• Routine hydraulic brake service on older Polaris quads
• Farm, ranch, and utility work where dependable front braking matters

Specs At A Glance

Good To Know

Q: Will this fit my Trail Boss 325 or 330? A: It is listed for the 2002 Trail Boss 325 and 2003-2013 Trail Boss 330. Confirm your model year and front brake layout before ordering.

Q: Do I need to bleed the brakes after installing it? A: Yes. Any time a master cylinder is replaced or the brake line is opened, the front brake circuit must be bled to remove air.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.