I just bought an Aktiv Grizzly (Polaris?) that I think is an '85 or '86. It has the 440 engine. It seems to be in relatively good shape, but after running perfectly for a few minutes, it starts starving for fuel. I've done enough trouble shooting to confirm that it is a fuel issue, but I don't know what to do about it. I'll describe some of its lackings, and if anything rings a bell, I'd appreciate opinions. Problem number 1, it has a makeshift fueltank with no kind of check valve in the tank. I'm not sure whether I should crack the cap to vent the tank or what. Does anyone know where I should look for a tank? The cooling fan on the left side of the drive shaft is broken, and the housing that goes around it is gone. I am going to try to take this to a machine shop unless anyone knows where I could find a replacement. I never knew what the housing was supposed to look like until I saw pictures in another thread, now I'm wondering if this is my fuel problem. It looks like this fan either cools or warms the incoming air/fuel mixture? Since I don't have the fan on there, or the housing to direct the air to the intake, would this fully explain my fuel problem? Any advice and/or connection to parts or manual would be appreciated. Thanks