hi everyone, I am starting to pull my hair out over this bike. Bike runs but it seems it isn't running on all cylinders. So I frist pulled the plugs off while the bike was running to see which ones were good and bad. Cylinder 1 rpms didn't change. Cylinder 2 rpm's went up (suprised me). Cylinders 3 and 4 rpm's went down. Now I am stuck because I know they are all sparking but not sure where to go from here...any help would be greatly appreciated.