Suzuki Intruder VL1500B Owner's Manual page 133

 WARNING
Brake fluid will gradually absorb mois-
ture through the brake hoses. Brake fluid
with high water content lowers the boil-
ing point and can cause brake system
malfunction due to corrosion of brake
components. Boiling brake fluid or brake
system malfunction could result in an
accident.
Replace the brake fluid every two years
to maintain braking performance.
 WARNING
The use of any fluid except DOT4 brake
fluid from a sealed container can dam-
age the brake system and lead to an
accident.
Clean filler cap before removing. Use
only DOT4 brake fluid from a sealed con-
tainer. Never use or mix with different
types of brake fluid.
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