I was doing my valves on my 2005. Had the bike in neutral, sprockets tied up, 90 degrees from TDC, #1 intake lobes pointing down - exhaust out. Took off the intake sprocket with no problem. Went to take off the exhaust. Came off with no problem, but as I was taking it off it seemed to jump on me slightly. Went from straight out to slightly pointing up. Went ahead and took out the cams and buckets. I am now asking if I need to do or check anything before the rebuild. Thanks.