Polaris Outlaw 9922079 Owner's Manual page 51

Features and Controls
Master Cylinder/Brake Fluid
WARNING
An over-full master cylinder may cause brake drag or brake lock-up, which could result in an accident.
Maintain brake fluid at the recommended level. Do not overfill.
Never store or use a partial bottle of brake fluid. Brake fluid is hygroscopic, meaning it rapidly absorbs
moisture from the air. The moisture causes the boiling temperature of the brake fluid to drop, which can
lead to early brake fade and the possibility of brake failure, which could result in an accident. After
opening a bottle of brake fluid, always discard any unused portion.
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