So, just pulled the tank and airbox off to check the valves. one was at the high, screw it, put it back together, refilled oil. (i had it drained because of a Sprag clutch issue. Anyway, get the bike back together last night, fires right up. Ride it to work today (Brrrrr) and notice it just doesn't seem right at small throttle openings. Take it for a longer cruise on the way home (the direct route is like 3 miles) and notice two very interesting things. Bike doesn't quite want to idle, well, it was extremely surgey at idle, think bucking bronco, and it would not pop on decel... well it will but bearly and only at about 2k rpm, where it used to do it above 4k. Also, the fuel mileage on the instant gauge just doesn't quite seem right when under power. And when returning to idle it won't go to 99.9 like it usually does, and if anything it goes down. (less throttle, worse gas mileage. Sorry officer i had to keep the throttle wide open to be green)
I'm going to guess I didn't put something together right. There was a plug at about the back right of the engine on the wiring harness that didn't seem to go anywhere, and looked like it hadn't been connected to anything anyway, so that is still disconnected (it's in the same area as the fuel level sender connection) and I didn't mark which connection was on the fuel pump, so that's connected to the one closest to the fuel line. Nothing connected to the other location.
So... ideas? I know it is coming back apart just if i had an idea of where to look it would be nice.
btw, 2006 sprint st w/23k miles, and apparently a k&n airfilter.