ATHENA Valve Cover Gasket for KTM, HUSQVARNA and GAS GAS 2023-2025

The ATHENA S410270015023 valve cover gasket is designed for KTM EXCF 250, EXCF 350, SXF 250, SXF 350, XCF 250, XCF 350, GAS GAS ECF 250, ECF 350, EXF 250, EXF 350, MCF 250, MCF 350 and HUSQVARNA FC 250, FC 350, FE 250, FE 350, FX 350 from 2023 to 2025. The valve cover gasket stops valve train oil from escaping from the engine. It comes off at every valve clearance check and eventually hardens with the heat.

Specifications

• Brand: ATHENA
• Manufacturer part number: S410270015023
• EAN code: 8051757085842
• Weight: 50 g
• Engine: 4-stroke

When to replace it?

• Oil seeping around the valve cover or into the spark plug tube.
• Gasket hardened, flattened or split on removal.

During a valve clearance check or work on the valve train, as soon as the gasket is hardened, flattened or damaged.

Fitting tips

1. Clean the groove in the cover and the cylinder head face.
2. Seat the gasket properly in its groove; sealant goes only where the manual calls for it (often the camshaft half-moons).
3. Tighten the screws in a criss-cross pattern to the manufacturer's torque, without crushing the gasket.
4. While it's apart, adjust the valve clearance with valve shims if needed and replace the spark plug.

Why ATHENA?

Founded in 1973 near Vicenza, Athena is an Italian engine gasket specialist that has made its gaskets on its own production lines since day one, as well as a renowned manufacturer of pistons and cylinder kits. The brand supplies original equipment to manufacturers such as KTM, Ducati, Fantic, Piaggio and Triumph, and is a partner of the MXGP motocross world championship.

Spare parts and items to plan

• Valve shims : PROX 29.890 · PROX 29.VSA890
• Spark plug : NGK 97225 · NGK 3521
• Valve stem seals : PROX · CENTAURO
• 4-stroke engine oil : MOTUL 10W50 · LIQUI MOLY 10W40 1 L

Frequently asked questions

Should it be replaced at every valve check?
Not necessarily if it is still supple and intact, but a hardened gasket always ends up leaking.

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
GAS GAS ECF 250 2024
GAS GAS ECF 350 2024
GAS GAS EXF 250 2024
GAS GAS EXF 350 2024
GAS GAS MCF 250 2024
GAS GAS MCF 350 2024
HUSQVARNA FC 250 2025
HUSQVARNA FC 250 2024
HUSQVARNA FC 250 2023
HUSQVARNA FC 350 2025
HUSQVARNA FC 350 2024
HUSQVARNA FC 350 2023
HUSQVARNA FE 250 2025
HUSQVARNA FE 250 2024
HUSQVARNA FE 350 2025
HUSQVARNA FE 350 2024
HUSQVARNA FX 350 2024
HUSQVARNA FX 350 2023
KTM EXCF 250 2024
KTM EXCF 350 2024
KTM SXF 250 2025
KTM SXF 250 2024
KTM SXF 250 2023
KTM SXF 350 2025
KTM SXF 350 2024
KTM SXF 350 2023
KTM XCF 250 2025
KTM XCF 250 2024
KTM XCF 250 2023
KTM XCF 350 2025
KTM XCF 350 2024
KTM XCF 350 2023