Mikuni N133200-2.3 TM33 Needle & Seat Valve Assembly 2.3mm Viton Tip

The Mikuni N133.200-2.3 is a genuine OEM-spec needle and seat valve assembly designed for the Mikuni TM33 flat-slide pumper carburetor. This assembly serves as the float valve, controlling and regulating fuel flow from the fuel tank into the carburetor float bowl to maintain a consistent fuel level during operation.

This 2.3mm size is the largest available in the N133.200 series, making it ideally suited for gravity-feed fuel systems where maximum fuel flow capacity is required. The push-in style assembly features a Viton-tipped needle for excellent fuel compatibility and long-lasting sealing performance, along with a press-in needle valve seat and a sealing O-ring.

Key Features:

• Genuine Mikuni OEM-quality replacement part
• 2.3mm orifice diameter — largest in the N133.200 series, optimized for gravity-feed fuel delivery
• Viton-tip needle for superior fuel resistance and durability
• Push-in style with press-in needle valve seat and sealing O-ring included
• Regulates fuel flow rate from tank to float bowl for accurate fuel metering
• Direct OEM replacement for TM33-8012 pumper carburetors

The N133.200-2.3 is a direct replacement float valve for the Mikuni TM33-8012 pumper carburetor platform, including OEM Mikuni TM33 installations on DR350 off-road motorcycles (1990–1999) and snowmobile applications equipped with OEM TM33 carburetors. Size selection within the N133.200 range is determined by fuel delivery method — larger sizes are recommended for gravity-feed setups, while smaller sizes are appropriate for fuel-pumped systems.