- New
ATHENA Cylinder Head for ATHENA cylinder kit for YAMAHA YZ 85 2019-2026
€127.90
Tax Included
ATHENA cylinder head for YAMAHA YZ 85 from 2019 to 2026.
The ATHENA S410485308035 cylinder head is designed for YAMAHA YZ 85 from 2019 to 2026. The cylinder head closes off the top of the cylinder and forms the combustion chamber. On a two-piece VHM head, the chamber is a machined insert that can be swapped in a few minutes to adapt the engine's compression.
Specifications
- Brand: ATHENA
- Manufacturer part number: S410485308035
- EAN code: 8051757071630
- For ATHENA cylinder kit ref. P400485100077 (Ø53 mm)
- Engine: 2-stroke
Who is it for?
- Original head damaged by pinking (detonation), cracked or warped.
- You want to match the compression to the fuel, the terrain or a tuned engine.
- You're after a smoother or snappier engine without changing the cylinder.
Good to know
The insert is chosen to suit your engine and your fuel: a smaller chamber volume raises compression, which may call for a higher-octane fuel. Always check the squish when fitting.
Fitting tips
- Clean the cylinder mating face without scratching it.
- Fit new O-rings and grease them lightly so they stay in place.
- Check the squish (gap between piston and head) with solder wire before riding.
- Tighten the head in a criss-cross pattern, in several stages, to the recommended torque.
- Fit a new spark plug and refill the coolant.
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
- Piston : ATHENA S5F05300001 · ATHENA S5F05300001A
- Top end gasket kit : ATHENA
- Exhaust power valve parts : ATHENA
- Cylinder kit bolt kit : ATHENA
- Spark plug : NGK 6801 · NGK 3830
- Coolant : LIQUI MOLY 1 L · TWIN AIR
Frequently asked questions
Can I change the compression later?
Yes: just swap the VHM insert, without removing the cylinder.
Compatibility
Check the exact model and year of your bike in the list below before ordering.
Fits:
YAMAHA YZ 85 2026
YAMAHA YZ 85 2025
YAMAHA YZ 85 2024
YAMAHA YZ 85 2023
YAMAHA YZ 85 2022
YAMAHA YZ 85 2021
YAMAHA YZ 85 2020
YAMAHA YZ 85 2019
S410485308035
Specific References
Click on your bike to see all compatible parts.
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ATHENA cylinder head for YAMAHA YZ 85 from 2019 to 2026.
ATHENA Cylinder Head for ATHENA cylinder kit for YAMAHA YZ 85 2019-2026
€127.90
Tax Included