250-500cc stuck on trail now overheated

this is what i get for skipping work

Tight rocky trail first second gear bike overheated

can lean setting cause this?
Any suggestions?

Let the bike cool down, poured 1/2 liter of water in there and rode fine for the rest of the day... Weird..

Lucky! Yes lean jetting will cause you to overheat/seize the engine.

I thought lean jetting is a problem when riding wide open for period of time....but can it really cause problem chugging along rocky trails in low gears?

absolutely. no air flow and a motor running too hot equals boil over. lean jetting make it run HOT. more gas actually cools down the combustion.

Interesting...
I have Lectron, and I did lean out powerjet to see if power can be improved, however, I thought powerjet only kicks in at higher rpm/ throttle opening.

But I was at low rpm, meaning I can possibly be lean at my current rod setting...will call Lectron tomorrow to see what they think, but running wise, bike ran perfectly today. Very crisp and good power everywhere. No hesitation and very smooth.

I might have been low on coolant to begin with...I actually never checked it after buying the bike.