It is probably not related, but it is a cool story. In 1972, fresh out of high school, I landed my dream job: Work at the local Honda shop. One of my duties was to uncrate, set up, and service new bikes. Z-50 was a hot model. The ones with legal road gear and street legal in Florida. I put one together, serviced it, added gas...…...and it wouldn't start. No Spark. I disconnected the kill wire. Checked everything, no joy. Owner's son, a very capable mechanic said "Let me show you how it is done". He changed out every single part of the ignition system, TWICE. No spark. Parked the bike in the corner for until the territory service rep showed up for his once a month visit. Rep shows up. We put the bike on the service bench. Rep wanted an impact and a hammer. Took off the left cover, pulled the flywheel, Took out the two countersunk retainer screws that hold the ignition plate in place, Walked over to the bench grinder and wire brushed the crap out of the BACK of the two screws. Put everything back together, and it fired on the first kick. Bad ground because the screws had a problem with the plating. After brushing the plating off, they worked fine. True story. I had an XL-350 that failed two factory ignition coils. I installed a 6 volt Volkswagen coil, and it worked great. Had the bike for 10 more years before I sold it.