Polaris 340 LX Owner's Manual page 52

Before Starting the Engine
Parking Brake Lever Lock
Lock Release
To release the lock, squeeze the brake lever tightly and release it. The
lock will return to the unlock position.
If the parking brake lever lock is partially or entirely engaged while riding, the
brakes may overheat, resulting in brake damage. In extreme cases it could
cause a fire, which could result in serious injury or death. Always ensure that
the lever lock is completely disengaged before operating the snowmobile.
PRE-RIDE INSPECTIONS
WARNING
49