ATHENA Cylinder Head Gasket O-ring Ø88.64 x 1.78 mm for YAMAHA, BETA and FANTIC 1990-2026

ATHENA offers this cylinder head gasket for YAMAHA, BETA and FANTIC 1990-2026. The head gasket takes the pressure and heat of every combustion. It is crushed when the head is torqued down and must be replaced every time the head comes off.

Why replace this gasket every time it is removed?

The benefits:

• A new gasket guarantees a perfectly sealed joint.
• Material designed to withstand heat, oil and coolant.
• An inexpensive part that saves doing the job twice.

Why choose ATHENA?

Athena, founded in 1973 by Giovanni Mancassola near Vicenza and based in Alonte (Italy), designs gaskets, pistons and cylinder kits; it supplies original equipment to manufacturers such as KTM, Ducati, Fantic and Triumph.

When should you replace the head gasket on your YAMAHA YZ 125?

Loss of compression, a dropping coolant level, bubbles in the radiator or traces between cylinder and head: the gasket needs changing. It is also replaced every time the head comes off.

No manufacturer figure in hours for this model. Cross-Mania guideline: compression check every 20 h of hard use and every 40 h of leisure riding.

Specifications and fitting tips

• Material: FKM (Viton)
• Manufacturer part number: M751802350094

Spare parts and items to plan

• Top-end gasket kit : ATHENA 150 · PROX
• Piston : ATHENA S4C05800003 · ATHENA S4C04450001
• Coolant : LIQUI MOLY 1 L · TWIN AIR
• Spark plug : NGK 3530 · NGK 4055

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
BETA ALP 250 1999
BETA ALP 250 1998
BETA ALP 250 1997
BETA ALP 250 1996
BETA ALP 260 1995
BETA SYNT 260 1994
BETA SYNT 260 1993
BETA SYNT 260 1992
BETA SYNT 260 1991
BETA SYNT 260 1990
BETA ZERO 260 1993
BETA ZERO 260 1992
BETA ZERO 260 1991
BETA ZERO 260 1990
FANTIC XE 125 2026
FANTIC XE 125 2025
FANTIC XE 125 2024
FANTIC XE 125 2023
FANTIC XE 125 2022
FANTIC XE 125 2021
FANTIC XX 125 2026
FANTIC XX 125 2025
FANTIC XX 125 2024
FANTIC XX 125 2023
FANTIC XX 125 2022
FANTIC XX 125 2021
YAMAHA YZ 125 2026
YAMAHA YZ 125 2025
YAMAHA YZ 125 2024
YAMAHA YZ 125 2023
YAMAHA YZ 125 2022
YAMAHA YZ 125 2021
YAMAHA YZ 125 2020
YAMAHA YZ 125 2019
YAMAHA YZ 125 2018
YAMAHA YZ 125 2017
YAMAHA YZ 125 2016
YAMAHA YZ 125 2015
YAMAHA YZ 125 2014
YAMAHA YZ 125 2013
YAMAHA YZ 125 2012
YAMAHA YZ 125 2011
YAMAHA YZ 125 2010
YAMAHA YZ 125 2009
YAMAHA YZ 125 2008
YAMAHA YZ 125 2007
YAMAHA YZ 125 2006
YAMAHA YZ 125 2005
YAMAHA YZ 125 2004
YAMAHA YZ 125 2003
YAMAHA YZ 125 2002
YAMAHA YZ 125 2001
YAMAHA YZ 125 2000
YAMAHA YZ 125 1999
YAMAHA YZ 125 1998
YAMAHA YZ 125 1997
YAMAHA YZ 125 1996
YAMAHA YZ 125 1995
YAMAHA YZ 125 1994