Alright, I was out on a local MX track a few weeks ago, after a few laps we took a break, when I went to start the bike for a few more laps I noticed a whisteling sound, and sure enough, my bottom cylinder gasket had blown.
I finaly get the gaskets and open the engine only to find this
the scratches are not deep but I can feel them with my finger, I guess a hone and a new piston will get me going again, but I want all of you guys opinions on what happend here.
to me it looks like overheating, could it be I've been running with a leaking gasket a long time, causing a lean condition? could it be I was running lean during this winters iceriding?
the rest of the cylinder looks good to me.