Keep your classic Yamaha two-stroke feeding steady, bubble-free fuel with the Fuel Pump Gasket 650-24431-A0-00. Sandwiched between the pump body and cover on every 40 hp through 90 hp 650-series engine, this thin seal does three big jobs at once: holds suction on each crank-pulse, keeps ethanol-blended fuel from weeping down the block, and blocks salt spray from wicking into the diaphragm chamber.

Why stick with the real Yamaha gasket

• Nitrile-bonded fiber stands up to E10 gasoline and 180 °F under-cowl temps without shrinking or turning brittle.

• Laser-cut bolt and pulse holes line up perfectly—no trimming, no risk of blocking the tiny check ports that feed the carbs.

• 0.4 mm compression bead seals minor casting nicks, so you can torque the screws to spec without smearing RTV.

• Embossed part number makes future services simple—one glance and you know it’s factory.

Replace the gasket any time you rebuild the pump or chase a mid-range stumble; the ten-minute swap rewards you with cleaner starts, crisper throttle response, and the peace of mind that every drop of fuel is staying where it belongs.

• Supersessions
  650-24431-00-00