I dunno, maybe it's too many years dealing with 60s and 70's vintage motorcycles with weak ignition systems but misfires under load just scream SPARK in my ears. I had a couple of Honda single cam cb750s and once the plugs got a few miles on them they would develop a case of the blind staggers at anything over half throttle. I eventually reworked the ignition system from points to electronic triggers and upgraded the coils and never had another problem.
Edit: and I won't even mention Brit bikes. My Nortons were testimonials to Joe Lucas' title of "Prince of Darkness."
I had a picture that was supposedly of him on my garage wall. The caption said "Be Home Before Dark." Oops I guess did mention them. The most damaging lies we tell are those we tell ourselves.
