2008 Polaris ATV Predator 50, Sportsman Outlaw 90 Service Manual, Page 91Get this manual

2008 Polaris ATV Predator 50, Sportsman Outlaw 90 Service Manual, Page 91

FUEL SYSTEM Carburetion Specifications
PREDATOR 50 Cutaway Pilot Air Screw NeedleSeat Pilot Jet Main Jet E-clip Position na 2.5 turns out 1.2 12.5 62.5 #4 From Top

CARBURETOR OPERATION
Operation Overview
The engine of vehicle is operated under wide range of conditions, from idling with the throttle valve remaining almost closed, to full load or maximum output with the throttle valve fully openedIn order to meet the requirements for the proper mixture ratio under these varying conditions, low speed fuel system, or pilot system, and main fuel system are provided in these type of carburetorsThe function of carburetor is to produce combustible airfuel mixture by breaking fuel into tiny particles in the form of vapor, to mix the fuel with air in proper ratio, and to deliver the mixture to the engineA proper ratio means an ideal airfuel mixture which can burn without leaving an excess of fuel or airWhether the proper mixture ratio is maintained or not is the key to efficient engine operationThis carburetor has varying operations depending upon varying driving conditionsIt is constructed of float system, pilot system, main system, and starter system or initial starting device