SHINDY 03‑321 Carburetor Repair Kit – Yamaha YFM350 Grizzly / Grizzly IRS / Grizzly 350 4x2 / Bruin 350 (2004‑2014) – Made in Japan – OEM Carb Rebuild Kit

OVERVIEW

The SHINDY 03‑321 carburetor rebuild kit restores precise fuel metering, stabilizes idle mixture quality, and seals internal diaphragm and case leaks on Yamaha ATVs. This assembly pairs precision-cut brass jets with high-grade rubber-topped float valves and synthetic gaskets designed to resist degradation from modern fuel blends. Engineered exclusively for the Yamaha YFM350 platform, it returns your carburetor to reliable factory operation.

ENGINEERING & PERFORMANCE

Rubber-topped float valves utilize a dense rubber composition over a plated brass body to actively resist swelling and degradation caused by ethanol and methanol fuels. Each pilot jet, needle, and adjustment screw maintains exact OEM flow diameters, ensuring predictable throttle transfer and crisp response under varying loads. Dimensionally matched gasket and seal assemblies prevent vacuum loss while accommodating normal thermal expansion during extended trail runs.

KEY FEATURES

• Made in Japan using premium raw materials
• Award-winning rubber-top float valves with plated brass body
• Precision-cut main and pilot jets
• Complete set of jet needles and float mechanisms
• Fuel-resistant rubber top seats with vibration dampening
• Synthetic O-rings for secure fuel-system sealing
• Full chamber and base gasket coverage
• Idle, pilot, and air screw sets included where applicable
• Common jet sizes pre-assembled for stock carburetor calibration

TECHNICAL SPECIFICATIONS

• Brand: SHINDY
• Part Name: 03‑321 Carburetor Repair Kit
• Component Type: Carburetor Repair Kit
• Materials: Brass jets, high-grade rubber float valves, plated valve seats, synthetic gaskets
• Supported Years: 2004–2014
• Compatible Trims: Yamaha YFM350 Grizzly 4x4 Auto, Grizzly IRS 4x4 Auto, Grizzly 350 4x2, YFM350BA Bruin 4x2, YFM350FA Bruin Auto 4x4

FITMENT

• Yamaha YFM350 Grizzly 4x4 Auto (2007–2014)
• Yamaha YFM350 Grizzly IRS 4x4 Auto (2007–2012)
• Yamaha Grizzly 350 4x2 (2007–2011)
• Yamaha YFM350BA Bruin 4x2 (2004–2006)
• Yamaha YFM350FA Bruin Auto 4x4 (2004–2005)

WHY RIDERS CHOOSE THIS

Riders select this kit to resolve floating valve leakage and hardened seals that cause bogging and unstable idling on aging Grizzly and Bruin carburetors. The plated rubber‑top valve design stops fuel seepage faster than standard neoprene alternatives, while precision-cut jets deliver consistent mixture delivery across varying altitudes. Because every gasket and orifice meets Japanese OEM tolerances, the engine pulls cleanly through the mid-range and stabilizes immediately without requiring constant manual tuning. This assembly consolidates dozens of hard-to-source components into a single dependable refresh tailored for Yamaha's 350 utility engines.