The battery for my 2004 polaris sportsman 500 HO was recently put in backwards and began smoking when the key was turned. I have switched the battery and put wiring back to make sure it is correct. I then turned the key and found that I still have power to the machine and it does crank. The first time I got a faint burning smell and removed the grill along with plastic cover. I tried it again and it still was cranking no burning smell however I figured id hold off going any further to try to prevent any damage. Any ideas on what may need to be replaced?? Thank you for any and all input as it is greatly appreciated.