Worst thing is that power doesn't drop off much at all when you go from "perfect" to lean, that's why no one notices it and melts down.X(I think it's also relative to tires/gearing too. The object is to pull as hard and as long as you can. Fuel demands are highest at heaviest load.
I have actually never "cut" a plug, I'm like Blaaster, I'll leave a horse or two in the barn, thank you I:I, the ONLY thing that cools the piston is the incomeing fuel/air charge. As long as it runs good and doesn't foul plugs it's lean enough. Properly tuned the exhaust temp about 6" from piston face is about 1200*f, aluminum melts at about 750*f, hhmmmmm, you do the math
Are we talking Blasters or trying to make a few on here blush???
I almost agree with what you say, but lubrication cools the piston too. It is a dangerous game to play though, 1200*f versus atmospheric temp mixed with gas and oil...the 1200*f keeps it hot much longer than the mix hitting it can cool it...that's why you gotta keep an eye on the plug chop. I think the important thing that a lot of people miss, is when they have that nice cardboard/biscuit color, that is the fine line, they would be smart to bump up 1 main size, to ere on the side of safety and finances.
And yes, lubrication reduces friction...but, also, has a slower boiling point too, so it tends to stay "cooler" longer. Being a machinist at one brief point in my life, that was why we flooded parts with coolant/lubricator, to keep the inserts from dulling and breaking from heat of the cutting. No matter what, I would prefer to be rich and riding for a long time, than lean and always worrying...even it if was slightly lean.
