- New
ATHENA Cylinder Head Gasket O-ring Ø117.10 x 1.78 mm for YAMAHA YZ 250 1986-1987
€0.90
Tax Included
ATHENA head gasket for YAMAHA YZ 250 from 1986 to 1987.
On YAMAHA YZ 250 from 1986 to 1987, the ATHENA M751802462004 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: M751802462004
- EAN code: 8051757098491
- Material: NBR (nitrile rubber)
- 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
- Clean the cylinder head and cylinder faces without scratching them.
- Seat the O-ring properly in its groove, without twisting or stretching it, so it doesn't get pinched when tightened.
- No sealant on the gasket.
- Tighten the cylinder head in a criss-cross pattern, in several stages, to the manufacturer's torque.
- 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 P400485600267 · ATHENA S410485006144
- Piston : WISECO · ATHENA
- Coolant : LIQUI MOLY 1 L · TWIN AIR
- Spark plug : NGK 3430 · NGK 3130
Frequently asked questions
How many O-rings do I need?
Depending on the engine, the head has one or two (inner and outer). Compare with your original seals or your manual before ordering.
Compatibility
Check the exact model and year of your bike in the list below before ordering.
M751802462004
Specific References
Click on your bike to see all compatible parts.
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ATHENA head gasket for YAMAHA YZ 250 from 1986 to 1987.