Athena top-motor Gasket setRef : ATH00604A / 1129121

ATHENA Top End Gasket Kit (manufacturer part number: P400485600199) — a package designed for servicing the cylinder head and the top end of motocross engines. Ideal for mechanics and riders who are overhauling a top end, this kit includes all the sealing elements necessary to restore the mating surfaces and limit leaks between chambers, passages, and cases.

Made in Italy, ATHENA applies industrial expertise with precision laser cutting, targeted surface treatments, and material stress relief processes. These steps contribute to a quality of cut and fit that facilitates the assembly and refurbishment of oil and cooling circuits where sealing is critical.

• Contents: all gaskets necessary for servicing the cylinder head and top end of the engine (top end kit).
• Universe: Motocross — suitable for small displacement competition and recreational bikes.
• Common compatibilities: Yamaha YZ 85 (2025–2026) and LW Big Wheel versions listed among the applicable motorcycles.

Convenient to store in the workshop, this kit allows you to start with a clean slate when disassembling the top end. Be sure to check the manufacturer part number and the condition of the mating surfaces before assembly to ensure compliance with the engine manufacturer's recommendations.