Each wing should reach about half way across the piston. Maybe not all the way, your intake system and porting will determine how far. They should reach about 2/3 the piston in the forward to back position. Again has to do with intake and porting, plus squish distance. The squish area of the piston when set right is relatively cool, and clean. There will be a little junk, we are burning stuff in there after all. When in perfect tune, the residue on the piston crown, should wipe off easily. You were way to rich from the air leak, so your wings should have a carbon hunk around them. An running a bit extra oil, if the right amount of fuel, should still leave relatively easy to clean residue. The oil is what keeps the inside of the chamber clean. It carries away all the junk. So these guys that run 50:1 and higher, are losing the ability to carry junk from the fuel and air that makes it in, away. Idc if you use saber or whatever that says you can go 100:1. it doesn't carry the junk away, there is not enough oil to do so. So instead it hangs out and wears parts down till it finally gets spit out, or sticks to something in the chamber. If you don't get a little drip, drip from the pipe when you come to ride it after sitting over night, you are to low on oil. There shouldn't be a big puddle, but a few drips, maybe a quarter sized puddle or smaller under the exhaust tip if you run a stock muffler.
