I don't remember how long ago - but I'll guess it was six or more years ago at Maxton -- that I could have made more runs. I was lapping - but had to wait a little while extra between runs to let the motor cool. I had a regular cooling system and fan and everything, but I expect it was both hot weather - and just too dang many laps - that had the temp too high to run again and again and again. So I'd wait about 15 minutes or more 'tween runs. I suppose it was a Sunday, near the end of the event, too -- not so likely to happen on a Saturday mid-day. Nonetheless - lots of runs then.