RFX Pro Oil Air filter coverRef : RFX01422A / 1123309002

Manufacturer Ref: FXFC 40300 99H2 — RFX Pro Oil Filter Cover, designed for motocross use. Machined from 7075-T6 aluminum, this part combines rigidity and thermal stability to remain steady under engine heat and pressure. Its magnesium-colored anodized finish protects the surface and provides a racing look suitable for off-road machines.

The RFX geometry features an enhanced flow design to facilitate oil circulation around the filter, while the lightweight hollow construction reduces unsprung mass without compromising strength. RFX is also used by several Grand Prix and British motocross teams.

Main Features

• Material: 7075-T6 aluminum.
• Optimized design for increased oil flow.
• Magnesium-colored anodization.
• Hollow and lightweight design.
• Compatible with OEM O-rings.

Compatibility (examples)

• YAMAHA YZ 450 F (2026)
• FANTIC XXF 450 (2026)
• YAMAHA WR 450 F (2026)

Installation Instructions (summary)

• Drain the oil according to the manual.
• Carefully remove the old cover and O-ring, inspect the sealing surface.
• Install a clean OEM O-ring onto the new cover.
• If necessary, replace the filter and springs, then install the new cover.
• Fill with oil according to manufacturer recommendations.