Yamaha 2002 YFM350X Supplemental Service Manual page 18

PERIODIC MAINTENANCE/LUBRICATION INTERVALS
NOTE:
Recommended brake fluid: DOT4
G
Brake fluid replacement:
G
1.When disassembling the master cylinder or caliper, replace the brake fluid. Normally check the
brake fluid level and add fluid as required.
2.On the inner parts of the master cylinder and caliper, replace the oil seals every two years.
3.Replace the brake hoses every four years, or if cracked or damaged.
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CHK
ADJ