ATHENA Cylinder Head Gasket for KAWASAKI KDX 250, KX 250 1978-1984

On KAWASAKI KDX 250, KX 250 from 1978 to 1984, the ATHENA S410250001086 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: S410250001086
• EAN code: 8051757031306
• Thickness: OE
• Weight: 50 g
• 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 S410250006 · ATHENA S410250001055
• Piston : PROX 01.4322.B · PROX 01.4322
• Coolant : LIQUI MOLY 1 L · TWIN AIR
• Spark plug : NGK 3430 · NGK 3530

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:
KAWASAKI KDX 250 1984
KAWASAKI KDX 250 1983
KAWASAKI KDX 250 1982
KAWASAKI KDX 250 1981
KAWASAKI KDX 250 1980
KAWASAKI KX 250 1982
KAWASAKI KX 250 1979
KAWASAKI KX 250 1978