I took my bike apart and now its acting weird. I didn't do anything to the inside of the engine just removed everything from the frame. Exhaust, airbox, ext. When I accelerate hard in higher gears the bike stumbles or skips a couple beats. Its like the clutch is slipping except the rpms do not raise with a little bit of a shake, in fourth and 5th it will accelerate but hesitates more or less depending on how hard I open the throttle. Basically the engine doesn't produce any power. In 6th gear at 4000rpm it won't accelerate at all. Rolling on easily I can still reach 100+ mph. No warning lights. The bike is an 09 848 w 15,800 miles on it. Ive had all the services done except the 15000. Just got to the end of riding season and was planning on starting soon. The bike seems to start a little harder but still functions fine minus what I described above. The idle isn't erratic and I just put in new spark plugs, the fuel filter was changed 3000 miles ago and the air filter was cleaned and oiled as well, also had her tuned at 12,000mi. I know the 15000mi service will help but the bike ran excellent before I took it apart. I don't know if i need to reset the tps after taking off the exhaust and the airbox but the engine was completely off the frame. It has termi slip ons. Any one experience anything like this? Any help would be appreciated I love my bike and I just want her to be running like a top. Ill try things before taking it to the stealership.