Yamaha Big Bear YFM400FPR 2002 Manuel Du Propriétaire page 314

Brake fluid replacement
1. Complete fluid replacement should be done
only by trained Yamaha service personnel.
2. Have a Yamaha dealer replace the following
components during periodic maintenance or
when they are damaged or leaking.
G
Replace all rubber seals every two years.
G
Replace all hoses every four years.
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