Yamaha YP250 Service Manual page 186

FRONT BRAKE
3. Air bleed:
S Brake system
Refer to "AIR BLEEDING" section in
CHAPTER 3.
D Use only designated quality brake fluid:
Otherwise, the rubber seals may deterio-
rate, causing leakage and poor brake per-
formance.
D Refill with the same type of brake fluid:
mixing fluids may result in a harmful
chemical reaction and lead to poor perfor-
mance.
D Be careful that water does not enter the
significantly lower the boiling point of the
fluid may result in vapor lock.
4. Inspect:
S Brake operation
7-18
CHAS