420 cutting out help…

Hey guys, new here but not new to atvs or forums (I had 20k posts on highlifter until 2010)…
Bought an 07 rancher 420 that was a 2wd now almost a 4wd. First things first battery is dead and once I’m sure new battery holds a charge I need to tend to its drivability. The bike cuts out above 3/4 throttle. It sounds as if it is starving for fuel. Has been sitting up for 7 months. Can someone give me insight on location and replacement procedure of the fuel filter or strainer sock or whatever it may have? I work on FI automobiles everyday but never on an atv lol help needed here!