# QuadBoss 99-04 Yamaha YFM250 Bear Tracker Air Cut-Off Valve Kit

Improperly functioning air cut-off valves can stick open or closed, causing poor running conditions and popping during deceleration. Air Cut-Off Valve Kit includes O-rings, diaphragm, spring and screws necessary to rebuild the air cut-off valve circuit.

-   Complete rebuild kit with O-rings, diaphragm, spring, and screws to restore carburetor air cut-off function
-   Multi-carb models include components for all carbs; direct OEM replacement for reliable performance
-   Fixes sticking valves causing poor idle, popping on deceleration, and lean running conditions
-   Models with multiple carburetors include components to repair all carburetors

This Part Fits:

Year

Make

Model

Submodel

1999-2004

Yamaha

YFM250 Bear Tracker

Base

1987-2004

Yamaha

YFM350X Warrior

Base

1998-1999

Yamaha

YFM400F Kodiak 4x4

Base

## Details

- **Price:** 63.5 CAD
- **Vendor:** QuadBoss
- **Type:** Exhaust Valve Controllers

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 63.50 CAD | In stock |

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/quadboss-99-04-yamaha-yfm250-bear-tracker-air-cut-off-valve-kit)
> Updated: 2026-06-28