Moose / All Balls Carburetor Rebuild Kit for Polaris 250 Xplorer, Trail Boss, Trail Blazer, Scrambler, Big Boss (1986‑2006)

OVERVIEW

This carburetor rebuild kit restores precise fuel metering and engine performance for older Polaris 250cc ATVs. Designed as a direct replacement for worn internal parts, it uses durable nitrile rubber seals and precision-machined jets to return the original carburetor to reliable factory operation. The assembly is engineered specifically for this family of vintage off-road machines, covering every critical seal, jet, and valve needed after a full teardown.

ENGINEERING & PERFORMANCE

OEM-spec jets are included to deliver consistent fuel metering based on established baseline tuning targets. NBR rubber is used for all sealing rings and gaskets, maintaining tight pressure resistance against modern ethanol blends while surviving engine vibrations over time. A dedicated float valve needle and seat keep the chamber at the exact fuel level intended by the manufacturer, and the bundled mixture screws alongside float bowl fasteners guarantee that jetting accuracy stays locked in during aggressive riding.

KEY FEATURES

• Complete carburetor rebuild kit for 250cc Polaris platforms
• Nitrile (NBR) rubber O-rings and diaphragm gaskets
• Precision jets matching OEM cross-section sizes
• Float valve needle and reinforced seat assembly
• Calibrated mixture screws for idle and air-fuel trim
• Stainless steel float bowl fasteners
• Ethanol and solvent resistant sealing components
• Restores stock carburetor operation without aftermarket tuning

TECHNICAL SPECIFICATIONS

• Brand: All Balls
• Part Name: Carburetor Rebuild Kit
• Component Type: Carburetor Rebuild Kit
• Material: Nitrile (NBR) rubber seals; brass alloy jets; stainless steel hardware
• Supported Years: 1986–2006
• Compatible Trims: Xplorer, Trail Boss, Trail Blazer, Scrambler, Big Boss

FITMENT

• Polaris Xplorer 250 (2000–2002)
• Polaris Trail Boss 250 (1994–1999)
• Polaris Big Boss 250 6x6 (1991–1993)
• Polaris Trail Blazer 250 (1990–2006)
• Polaris Big Boss 250 4x6 (1989–1992)
• Polaris Trail Boss 250 4x2 (1988–1993)
• Polaris Trail Boss 250 4x4 (1987–1993)
• Polaris Scrambler 250R ES (1986)

WHY RIDERS CHOOSE THIS

Riders reach for this rebuild kit because it returns the carburetor to factory baselines without guessing which parts need replacement. The NBR sealing components actively block ethanol degradation, while the onboard float valve assembly guarantees stable fuel levels under hard acceleration and sudden impacts. Packing the exact OEM jet sizes, mixture screws, and float bowl hardware into one kit cuts downtime and removes the guesswork from vintage two-stroke and four-stroke maintenance. This configuration keeps older 250cc Polaris ATVs running exactly like they did when shipped, delivering dependable throttle response season after season.