plugs

I use a relatively quiet Schuberth C3 helmet on the street (getting the SR -1 for the track). I've never used ear plugs on the street or track on a bike, but had wired sets for my auto racing days for communication. my research indicates that plugs decrease overall fatigue on long runs...

Three weeks ago at a track day, my 1199s with the full Termi system started backfiring more than usual. The front cylinder sounded as if it wasn't firing right. Somewhat acted like a fouled plug or loose coil lead, though on investigation, I noticed that the header plug was missing. Thinking...