Good evening Jughead. The "finding" the bad cylinder advice works like magic. I did the water test....water steamed off the good cylinders and dripped off the bad one. I am guessing the canbus system does not pick up a plug but will register a fault if it is a coil. I will pick up a $22.5 spark plug tomorrow. I know how to change a plug now without pulling the radiator 100% off. One has to first pull the Tupperware, pull the front wheel, pinch off reservoir tank, Open drain and drain about 2 cups, undo the hose closest to riders left knee, remove top two clips that hold radiator. pull radiator forward, use tiny pry-bar to lift and remove plastic breather manifold. Use tiny pry-bar and big Flathead screwdriver to remove coil. (If you have never removed the breather manifold you would have to pull the radiator as that darn thing is difficult with the radiator off let alone doing it my way). Use a 4ft long extension, sparkplug two swivel sockets and perform surgery. when finished, just add the two cups back into the radiator and bleed the air
