Discolouration of headers close to engines are due to the extremely high temperatures at exit, lucky you it was jacket and not your hand.I was wondering, when I cold start my nineT the headers are untouchable hot within a short minute. I just started the bike and wanted to quickly wipe a bit of dust of the header with the sleeve of my jacket. Silly me, my jacket is now ruined, instantly melted where I touched it.
Is this just silly me? I know for obvious reasons the exhaust system will get hot, but I can’t remember my other bikes to get that hot within such a short time after a cold start.