ATHENA Cylinder Head Gasket for KTM EXC 125, EXC 200, MXC 200, SX 125, SXS 125 2001-2006

On KTM EXC 125, EXC 200, MXC 200, SX 125, SXS 125 from 2001 to 2006, the ATHENA S410270001022 head gasket fits in place of the original part. Between the cylinder head and the cylinder, the head gasket contains the pressure of every explosion. Once tightened, it takes the shape of the parts: on reassembly you need a new gasket to keep full compression.

Specifications

• Brand: ATHENA
• Manufacturer part number: S410270001022
• EAN code: 8051757201877
• Engine: 2-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?

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

• Top-end gasket kit : ATHENA · CENTAURO
• Piston : VERTEX 24243A · VERTEX 24419A
• Coolant : LIQUI MOLY 1 L · TWIN AIR
• Spark plug : NGK 2707 · NGK 3006

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:
KTM EXC 125 2006
KTM EXC 125 2005
KTM EXC 125 2004
KTM EXC 200 2004
KTM EXC 200 2003
KTM EXC 200 2002
KTM MXC 200 2003
KTM MXC 200 2002
KTM SX 125 2006
KTM SX 125 2005
KTM SX 125 2004
KTM SX 125 2003
KTM SX 125 2002
KTM SXS 125 2006
KTM SXS 125 2005
KTM SXS 125 2004
KTM SXS 125 2003
KTM SXS 125 2002
KTM SXS 125 2001