I'd put in some 27.5 pilots, 320 mains, and turn the air screw 1 1/2 out on both & then play w/ the idle....should fix it to run and idle fine....will need a top end sometime, but can still be used as is ...also probably wouldn't hurt to put some BRAND NEW spark plugs in (BR8ES NGK's)(good piece of mind on a new bike)(also change tranny fluid).....check the intakes for cracks or leaks, check choke tube, and clean the air filter (could be clogged and don't look like it)....just a couple maintenance ideas for a NEW bike to you!!