Yamaha BLASTER YFS200T Owner's Manual page 258

NOTE:
8 Recommended brake fluid: DOT 4
8 Brake fluid replacement:
9 When disassembling the master cylinders or caliper cylinders, replace the brake fluid.
Normally check the brake fluid level and add fluid as required.
9 On the inner parts of the master cylinders and caliper cylinders, replace the oil seals every
two years.
9 Replace the brake hoses every four years, or if cracked or damaged.
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