2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 46Get this manual
MAINTENANCE 3If some carbon is expelled, cover the exhaust outlet and lightly tap on the pipe around the clean out plugs with rubber mallet while revving the engine several more times
Brake System Inspection
The following checks are recommended to keep the brake system in good operating conditionService life of brake system components depends on operating conditionsInspect brakes in accordance with the maintenance schedule and before each ride Keep fluid level in the master cylinder reservoir to the indicated level inside reservoir Use Polaris DOT Brake Fluid Sight Glass
4If particles are still suspected to be in the muffler, back the machine onto an incline so the rear of the machine is one foot higher than the frontSet the hand brake and block the wheelsMake sure the machine is in Park and repeat Steps and 3SEE WARNING 5If particles are still suspected to be in the muffler, drive the machine onto the incline so the front of the machine is one foot higher than the rearSet the hand brake and block the wheelsMake sure the machine is in Park and repeat Steps and 3SEE WARNING