Keihin 018-664 O-Ring Plug Screw Genuine Replacement Part 16173-001-0040

The Keihin 018-664 is a genuine OEM replacement O-ring designed to seal the float bowl plug screw on Keihin PWK, PWK-S, PWM, PJ, and FCR-MX carburetors. This small but critical sealing component prevents fuel leaks at the drain/plug screw port of the float bowl, ensuring a proper airtight and fuel-tight seal during operation.

Key Features:

• Genuine Keihin OEM replacement part — not an aftermarket substitute
• Seals the float bowl plug (drain) screw to prevent fuel leaks
• Keihin OEM part number: 16173-001-0040
• SUDCO order number: 018-664
• Compatible across all PWK carb sizes (33, 35, 36, 38, 39, 41mm)
• Also fits Keihin PJ series carburetors (34–38mm) and FCR-MX series
• Sold individually

Replacing a worn or damaged float bowl plug O-ring is a simple, low-cost way to eliminate carburetor fuel seepage. This genuine Keihin part ensures a correct OEM-spec fit and long-lasting seal, making it an essential item for carburetor rebuilds, servicing, or routine maintenance on powersports, dirt bike, and racing applications.