2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 51Get this manual
MAINTENANCE Tire Inspection
Improper tire maneuverabilityinflation may affect ATV
CARBURETOR MAINTENANCE
Choke (Enricher) Adjustment (Non EFI)
When replacing tire always use original equipment size and type The use of non-standard size or type tires may affect ATV handlingTire Tread Depth Always replace tires when tread depth is worn to 18" mm) or lessTread Depth 18" (3 mm) Boot If the choke knob does not stay out when pulled, adjust the choke tension by tightening (clockwise) the jam nut under the rubber boot between the choke knob and nutFirmly grasp the rubber boot and tighten until the choke slides freely but stays out when pulled(3
Pilot Screw