Yamaha VMX17Y(C) - Manual (Page 59)

PERIODIC MAINTENANCE AND ADJUSTMENT
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the fluid. Regularly check the brake and clutch fluid levels and fill the reservoirs as required.
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Replace the oil seals on the inner parts of the brake or clutch master cylinders, caliper cylinders and clutch release
cylinder every two years.
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Replace the brake and clutch hoses every four years or if cracked or damaged.