Fuel Pump Tank Seal O-Ring 800090939 For MV AGUSTA Brutale F4 F4R F4RR 99-08

Fuel Pump Tank Seal O-Ring for MV Agusta

This fuel pump tank seal O-ring prevents fuel leaks between the pump assembly and the fuel tank, cross-referencing part number 800090939.

Overview

This fuel pump tank seal O-ring is critical for maintaining an airtight and leak-free fuel delivery system on high-performance motorcycles. Designed to resist degradation from modern ethanol-blended fuels, this fuel pump tank seal O-ring ensures safe and secure fuel containment. Motorcycle mechanics select this high-grade fuel pump tank seal O-ring when performing fuel system services or replacing fuel pumps.

Built For Performance

• Molded from fuel-resistant elastomer to prevent swelling and cracking.
• Designed to exact dimensional tolerances to ensure a tight, secure seal.
• Resists extreme temperatures inside and around the motorcycle engine bay.
• Provides consistent sealing pressure over long service intervals.

Fits These Machines

• for MV Agusta Brutale 1999-2008
• for MV Agusta F4 1999-2008
• for MV Agusta F4R 1999-2008
• for MV Agusta F4RR 1999-2008

On-The-Job Use

• Replaces stretched or degraded seals during fuel pump maintenance.
• Prevents dangerous fuel leaks from the bottom of the motorcycle tank.
• Restores the closed pressure environment needed for fuel injection systems.

Specs At A Glance

Good To Know

Q: Should sealant or grease be applied to this O-ring during installation? A: It is best to install the O-ring dry or with a very light smear of clean fuel to ease installation; avoid RTV silicone which can degrade and clog the fuel system.

Q: Why do original fuel pump O-rings leak? A: Standard rubber seals can degrade, swell, or crack over time due to contact with ethanol in modern pump fuels. This replacement is designed to resist ethanol degradation.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.