My 1999 Arctic Cat ZL 500 EFI takes from 25-50 pulls to start and when it starts it smokes bluish/black smoke and wont rev real high. Kinda boggy. I have to hold it half throttle and feather it and play with throttle for it to get up and go but once i stop the sled and go again at does same thing. It starts 2nd pull once its warm but doesnt run real good. The sled hasnt been run in a couple years. Any ideas?