ATHENA Cylinder Head Gasket for KTM EXC 400, EXC 450, SX 400 and BETA RR 400, RR 450 2000-2009

The ATHENA S410270001018 head gasket is designed for KTM EXC 400, EXC 450, SX 400 and BETA RR 400, RR 450 from 2000 to 2009. The head gasket seals between the cylinder head and the cylinder: it holds in the combustion pressure and, depending on the engine, the coolant. Crushed when tightened, it can never be reused.

Specifications

• Brand: ATHENA
• Manufacturer part number: S410270001018
• EAN code: 8051757135387
• Thickness: OE
• Weight: 50 g
• Engine: 4-stroke

When to replace it?

• Loss of compression, less lively engine.
• Black marks or hissing at the head/cylinder joint.
• Coolant level dropping, bubbles in the radiator.

Every time the cylinder head is removed, and therefore at every piston change.

Fitting tips

1. Clean the cylinder head and cylinder faces without scratching them.
2. Fit the gasket dry, the right way round, centred on the studs and the coolant holes.
3. No sealant on the gasket.
4. Tighten the cylinder head in a criss-cross pattern, in several stages, to the manufacturer's torque.
5. Refill the coolant and take the opportunity to replace the spark plug.

Why ATHENA?

Athena, an Italian company founded in 1973 near Vicenza, designs gaskets, pistons and cylinder kits for motorcycles. An OEM supplier to KTM, Ducati, Fantic, Piaggio and Triumph and a partner of the MXGP world championship, it develops its parts on the test bench and on the track with racing teams.

Spare parts and items to plan

• Top-end gasket kit : ATHENA · CENTAURO
• Piston : see the selection
• Coolant : LIQUI MOLY 1 L · TWIN AIR
• Spark plug : see the selection

Frequently asked questions

Is the gasket enough to refit the cylinder head?
It replaces the head gasket only. If you also remove the cylinder, go for a complete top end gasket kit instead.

Compatibility

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

Fits:
BETA RR 400 2009
BETA RR 400 2008
BETA RR 400 2007
BETA RR 400 2006
BETA RR 400 2005
BETA RR 450 2009
BETA RR 450 2008
BETA RR 450 2007
BETA RR 450 2006
BETA RR 450 2005
KTM EXC 400 2007
KTM EXC 400 2005
KTM EXC 400 2004
KTM EXC 400 2003
KTM EXC 400 2002
KTM EXC 400 2001
KTM EXC 400 2000
KTM EXC 450 2007
KTM EXC 450 2006
KTM EXC 450 2005
KTM EXC 450 2004
KTM EXC 450 2003
KTM EXC 450 2002
KTM SX 400 2007
KTM SX 400 2006
KTM SX 400 2005
KTM SX 400 2004
KTM SX 400 2003
KTM SX 400 2002
KTM SX 400 2001
KTM SX 400 2000