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yes ,i think they started in 94 and made them for a few years .
Most 91 polaris 400's are 2-stroke , and there is an oil tank in the front . Make sure the oil is 2-stroke oil for injection .
check fuses, check bulbs, from there see if there is a grond for your reverse lights that may need cleaning. If still no lights, make sure there is a good wire back to the transmission for your lights. Still no luck, look into the sensor on tranny for your reverse lights. Good luck.
presuming you've checked all the fuses and relays theres a sender switch on the transmission should have 2 wires attached to it.. make sure the wires are not disconnected or damaged
The most common reason for and electric fan not to run is a disconnected wire. Make sure all of the wires are connected and not corroded.
Air / petrol setting in the carberator requires setting. Also check the float level and needle height.
check the reverse light switch and all connections
yes,mix it 32-1 or 40-1 ,make sure the oil is 2-stroke for injection or pre-mix
fuel filter is above the radiator. mounted on the frame held in by plastic holders. u may have to take off the front storage compartment to make it easier to access
u have a short in ur wireing.
Bad bulbs? Blown fuse? Bad switch?
There is a switch called the reverse backup light switch attached to the shifter. When you move the shifter into reverse, the switch is closed and current goes back to the reverse lights. The switch is located on both auto and manual trans. After making sure your bulbs are good, that is where I would look. And make sure your fuses are not blown as well in your fuse block. There usually is not just a circuit dedicated to reverse lights only but there is always something a manufacturer will do some years just to be different.