ATHENA Cylinder Head Gasket for KTM EXC 125, EXC 200, MXC 200, SX 125, SXS 125, XCW 200 2003-2016

The ATHENA S410270001023 head gasket is designed for KTM EXC 125, EXC 200, MXC 200, SX 125, SXS 125, XCW 200 from 2003 to 2016. 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: S410270001023
• EAN code: 8051757081783
• Thickness: OE
• 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?

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 · MOOSE
• Piston : VERTEX 24419A · VERTEX 24243A
• 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 2004
KTM EXC 125 2003
KTM EXC 200 2016
KTM EXC 200 2015
KTM EXC 200 2014
KTM EXC 200 2013
KTM EXC 200 2012
KTM EXC 200 2011
KTM EXC 200 2010
KTM EXC 200 2009
KTM EXC 200 2008
KTM EXC 200 2007
KTM EXC 200 2006
KTM EXC 200 2005
KTM EXC 200 2004
KTM MXC 200 2003
KTM SX 125 2005
KTM SX 125 2004
KTM SX 125 2003
KTM SXS 125 2004
KTM SXS 125 2003
KTM XCW 200 2016
KTM XCW 200 2015
KTM XCW 200 2014
KTM XCW 200 2013
KTM XCW 200 2012
KTM XCW 200 2011
KTM XCW 200 2010
KTM XCW 200 2009
KTM XCW 200 2008
KTM XCW 200 2007
KTM XCW 200 2006