Got my first 4 stroke bike a few weeks ago. Went and rode it in the snow a little while ago and came back at dark. At idle, my head pipe was glowing bright cherry red at the cylinder. I haven't checked the plug to see if it was lean or not. Should i bother? Or do the newer 4-strokes just run that hot? It is a 2001 yz426f with a 448 big bore and gytr exhaust. The previous owner claimed to have the carb re-jetted to be proper, but i have not verified this yet Any input would be appreciated. I am trying to get all prepped and ready for riding season. So if i need to save up for some exhaust tape i will.