Polaris Predator 50 Owner's Manual page 86

Features and Controls
Brakes
Parking Brake
NOTE: This vehicle has a PVT system that's always in forward. Always lock the park
brake before starting the engine.
Always lock the parking brake whenever the vehicle is left unattended.
Since the transmission is always in forward gear, activating the throttle to warm the engine
will make the machine move forward if the park brake is not locked.
After the engine has warmed enough for operation, release the park brake and gently apply
the throttle to move forward.
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