Polaris 2003 Universal Snowmobiles - Manual (Page 102)

100
OPERATION
Reverse Operation (Mechanical)
Make sure the shift lever is shifted completely into forward or reverse
position. Some models are equipped with a reverse indicator light that
will help you make that determination.
Do not force the shift lever into reverse if resistance is felt. The gears
may not always be aligned for shifting into reverse, and forcing the
lever may cause damage. If resistance is felt, gently apply the throttle
to move the gears to a different position and try to shift again.
The transmission may not always be in the gear indicated by the shift
lever. Apply the throttle slowly until you’re sure which gear is
engaged.
Sometimes the drive belt will drag in the drive clutch, causing slight
tension in the transmission and making it hard to shift. Shutting the
engine off will remove this tension and ease shifting. This should only
happen during the break-in of a new belt or when the drive/driven
clutch center distance is too long. If this is the case, belt tension
adjustments should be made by your dealer.
Misuse of reverse can result in serious injury or death. This
snowmobile is capable of high speeds in reverse. Reverse
operation may be dangerous even at moderate speeds. Steering
control becomes difficult in reverse.
WARNING