- New


The seal that stops gearbox oil leaking around the front sprocket shaft.
MOOSE RACING offers this countershaft seal kit for YAMAHA YZ 450 F, YZ 450 FX from 2023 to 2025. The front sprocket drives the chain. Its shaft passes through the case and an oil seal (often with a bush) keeps the oil in.
The benefits:
Moose Racing has its gaskets made in the USA and supplies OEM-quality oil seals: everything needed for a leak-free rebuild, in a single kit.
Seepage around the shaft or a dropping oil level are warning signs. The seal is also replaced every time the cases are split.
Cross-Mania tip: Fit the seal square with a greased lip and check the running surface on the shaft: a worn surface quickly wears a new seal.
Check the exact model and year of your bike in the list below before ordering.
Fits:
YAMAHA YZ 450 F 2025
YAMAHA YZ 450 F 2024
YAMAHA YZ 450 F 2023
YAMAHA YZ 450 FX 2025
YAMAHA YZ 450 FX 2024
Click on your bike to see all compatible parts.
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