I am trying to help my father-in-law with his 2008 750. It sat for a while and then had trouble starting, of course. What it is doing now is it will start and idle just fine, but when you give it throttle it bogs about half throttle and beyond. I removed the air filter and same thing. I then put my hand over the air intake and almost completely blocked it and I then could give it full throttle. I'm thinking an air/fuel mixture issue? Or could a clogged fuel filter cause the problem? I know very little about this atv (or any for that matter) but I am very handy and work on our jeeps and my truck. Any help is greatly appreciated.