2015 Polaris Sportsman ETX EFI-Turn the key, turns over odd.Have to HOLD key in start position to stay on. Let go-shuts off. Must turn the key repeatedly to CRANK in order for it to crank up.

bunch of different reasons from fuel delivery to cdi etc --------------https://www.manualslib.com/manual/848461/Polaris-2008-Sportsman-800efi.html

One of the front axles are broke

I take help from online websites that have this service like helping in repair some like reliable-store have instant help.. others are a bit slow which I don't prefer... rest is up to u.. U can also get free manual works fine .

I would say based on information that the ignition switch is faulty,worn, or broken and would need to be replaced. Just to double check , it should remain in the acc position and not go back, doubt it would be financially or otherwise attempt to do a repair.

does it have more than a one year warranty

strange
small back fire on an EFI system...
low km

disconnect battery terminals = reset factory default
try start again

check valve adjustment

check transmission shift levers.
polaris has over ride safety switches..
owners manual may help....
or fuel ice blockage at or near the tank pickup,or flow/noflow valve.
could be ice in float bowl of carb. (if not efi.)
...maybe use hair dryer to heat area near carb/efi unit.

you have a short circuit on a positive wire. inspect your fuse box and your wiring harness for any visual damage

2 ways f you have a gas shut off on the bike you can shut it off and turn the bike over a few times to dry it out . best way is to remove spark plug blow it dry be carefull not to bend the prob. or just replace the plug any one should help you get it going if you have spark

yes. when u turn on the low beam the high will go off. bike is not designed to run both beams at the same time.

then you need a good wiring diagram, a 12v test light and some time