Polaris 250 ATV Carburetor Rebuild Kit (1986–2006) | Boss Bearing

Keep your classic Polaris 250 ATV running like it should with the Boss Bearing 26-1007B Carburetor Rebuild Kit — a complete, all-in-one repair solution for the Trail Boss, Trail Blazer, Big Boss, Scrambler, and Xplorer 250.

These tough little ATVs have been hauling riders through trails and fields for decades, and when the carburetor starts acting up — bogging on the throttle, leaking fuel, running rich, or refusing to idle — this kit has everything you need to get it back to factory spec without chasing down individual parts.

Built to match stock OEM carburetor specifications, the kit includes all the critical wear components that degrade over time: the main jet, slow/pilot jet, jet needle, float valve and seat, float chamber gasket, and carburetor springs. Whether you're doing a full carb rebuild on a bike that's been sitting in the garage, or chasing a fuel delivery issue on a machine you ride regularly, this kit gives you a clean starting point in one package.

The Trail Boss 250 and Trail Blazer 250 are among the most popular Polaris ATVs ever made, and finding quality carburetor parts for these older machines can be a challenge. This kit is built around the Mikuni carburetor used across the 250cc Polaris ATV lineup from 1986 through 2006, making it a reliable solution whether your machine is a late-80s classic or an early-2000s workhorse.

Kit includes:
• Main jet
• Slow / pilot jet
• Jet needle
• Float valve and seat
• Float chamber gasket
• Carburetor springs

Note: For closed-course/off-road racing use only. Please review product image to confirm kit contents before purchase.

This carburetor rebuild kit fits a wide range of Polaris 250cc ATVs spanning model years 1986 through 2006. Trail Blazer 250 fitment covers 1990–2006, including the Trail Blazer 250 ES (1996–1997). Trail Boss 250 fitment includes both 2x4 and 4x4 configurations from 1987–1999. Big Boss 250 coverage includes the 4x6 (1989–1992) and 6x6 (1991–1993) variants. The 1986 Polaris Scrambler 250 is also included, along with the Xplorer 250 4x4 for model years 2000–2002. See the full application table below to confirm fitment for your specific year and model.