Polaris 550 Indy 144 Owner's Manual page 62

OPERATION
Electronic Reverse (PERC)
WARNING
Improper reverse operation, even at low speeds, may cause loss of control,
resulting in serious injury or death. Damage will occur to the chaincase or
transmission if shifting is attempted when the engine is operating above idle
speed.
• Shift to or from reverse only when the snowmobile is stopped and when
engine speed is at idle.
• Look behind the vehicle before and while backing.
• Avoid sharp turns.
• Apply throttle slowly.
Engaging Reverse
Electronic reverse will activate only if the engine RPM is below 4000.
NOTICE: Engaging the starter when the engine is running WILL result in serious
engine damage, especially if the transmission is in reverse. Never
engage the starter when the engine is running.
1. Stop the snowmobile and leave the engine idling.
2. Make sure the area behind your vehicle is clear.
3. Push the yellow reverse button on the left-hand control for one
second, then release. The engine will automatically reduce RPM
and start a reverse rotation. A flashing reverse light on the
instrument panel will indicate that the transmission is in reverse.
4. Apply the throttle slowly to make sure the transmission is in
reverse.The maximum engine RPM will be 6000 when in reverse.
TIP: If the engine stops running, the snowmobile will be in forward gear when it's
restarted.
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