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ATHENA Top End Gasket Kit for FANTIC XE 125, XX 125 and YAMAHA YZ 125 2022-2027
€38.90
Tax Included
ATHENA top end gasket kit for FANTIC XE 125, XX 125 and YAMAHA YZ 125 from 2022 to 2027. Head, base and exhaust gaskets, O-rings and washers, depending on the model.
On FANTIC XE 125, XX 125 and YAMAHA YZ 125 from 2022 to 2027, the ATHENA P400485160100 top end gasket kit fits in place of the original part. As soon as the cylinder head or cylinder is removed, their gaskets must be replaced: crushed when tightened, they have taken the shape of the parts and will no longer seal. This kit groups under one part number the gaskets needed to reassemble the top end.
Key features
- Head, base and exhaust gaskets, O-rings and washers, depending on the model.
- Laser cutting and surface treatments for consistent sealing.
- Designed by Athena, an OEM supplier, and validated on test benches.
Specifications
- Brand: ATHENA
- Manufacturer part number: P400485160100
- EAN code: 8053300719594
- Weight: 60 g
- Engine: 2-stroke
When to replace it?
- Coolant or oil seeping at the head/cylinder or cylinder/crankcase joint.
- Coolant level dropping, bubbles in the radiator.
- Hissing or black marks where the exhaust leaves the cylinder.
At every piston change and every time the cylinder head or cylinder is removed, even for a simple inspection. Gaskets cost little compared with the work of stripping the engine.
Fitting tips
- Clean the gasket faces without scratching them (plastic scraper, solvent): they must be clean, dry and free of burrs.
- Fit the gaskets dry, without sealant, unless the workshop manual says otherwise.
- Refit a base gasket of the same thickness as the old one, unless you are deliberately adjusting the squish.
- Tighten the cylinder head in a criss-cross pattern, in several stages, up to the manufacturer's torque.
- While it's apart, replace the spark plug and refill the coolant.
- After break-in, check the torque with the engine cold and make sure there are no leaks.
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
- ATHENA cylinder kit : ATHENA P400485100100 · ATHENA P400485100102 · ATHENA P400485100101
- Piston : ATHENA S4C05400024 · ATHENA S4C05400025 · ATHENA S4C05800003
- Cylinder head and dome : ATHENA P400485200002 · ATHENA P400485200005 · ATHENA S410485308048
- Exhaust power valve parts : ATHENA P400485303001 · ATHENA P400485303002
- Cylinder kit bolt kit : ATHENA
- Spark plug : NGK
- Coolant : LIQUI MOLY 1 L · TWIN AIR
- 2-stroke oil : LIQUI MOLY 1 L 3065 · LIQUI MOLY 1 L 3063
Frequently asked questions
What does the kit contain?
Depending on the model: head gasket, base gasket, exhaust gasket, O-rings and washers. Compare with your original gaskets if you're unsure.
Should I replace it along with the piston?
Yes: as soon as the cylinder head and cylinder are off, new gaskets go back on. It's the right time to fit a new piston kit and new rings if the engine has some hours on it.
Compatibility
Check the exact model and year of your bike in the list below before ordering.
Fits:
FANTIC XE 125 2026
FANTIC XE 125 2025
FANTIC XE 125 2024
FANTIC XE 125 2023
FANTIC XX 125 2026
FANTIC XX 125 2025
FANTIC XX 125 2024
FANTIC XX 125 2023
FANTIC XX 125 2022
YAMAHA YZ 125 2027
YAMAHA YZ 125 2026
YAMAHA YZ 125 2025
YAMAHA YZ 125 2024
YAMAHA YZ 125 2023
YAMAHA YZ 125 2022
P400485160100
5 Items
Specific References
Click on your bike to see all compatible parts.
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ATHENA top end gasket kit for FANTIC XE 125, XX 125 and YAMAHA YZ 125 from 2022 to 2027. Head, base and exhaust gaskets, O-rings and washers, depending on the model.
ATHENA Top End Gasket Kit for FANTIC XE 125, XX 125 and YAMAHA YZ 125 2022-2027
€38.90
Tax Included