Ok so i have a 05 800 and was having problems with it getting fuel the filter wouldnt fill back up so id "run out of gas" so id pull over and would have to swith it to pri so it would work. After it got to where my bike wasn't getting fuel at all i flipped through different post on here and looked at countless videos on YouTube and through some careful fiddling and blind guessing i figuerd the vacuum release on the oem petcock wasent releaseing. I took the petcock apart a few times to clean it and decided to take out the vacuum sealing part and put it back on my tank. And vuola it leaked a crap ton of gas. So i fumbled through some more post and watched more videos and saw one saying you could use a suzuki lt80 manual gravity feed petcock it fits perfect. Looking at the petcocks on there i saw that it is exactly like the one on my big Bear that i already purchased a few month back. So i decided to give it a shot along with useing more hose and a better filter it works amazingly. So to make a long storry short switch to a manual petcock with a shutoff valve it will help you out in the long run.