2005 Polaris SPORTSMAN 700 EFI. 2008 Polaris RZR 800 EFI. 2005 Polaris SPORTSMAN 800 EFI. 2006 Polaris SPORTSMAN 700 EFI. 2006 Polaris SPORTSMAN 800 EFI. [FUNCTION] Fuel injector transfers gas from the tank into the engine cylinders to provide power for the vehicle.