Polaris Sportsman 90 - Manual (Page 144)

108
BATTERY
Replenishing the Battery Fluid
A poorly maintained battery will deteriorate rapidly.
Check the battery fluid level often. The fluid level
should be kept between the upper and lower level
marks.
To refill use only distilled water. Tap water contains
minerals which are harmful to a battery.
Maintain
between
upper and
lower level
marks