Ok, maybe this is a dumb question, but where is the smoke? I followed the instructions on both the Dax engines I've installed mixing the first tank at 16:1 and at 20:1 after break in. I thought that was a ridiculously oil rich mixture and expected to be fouling plugs constantly and be belching smoke when I ride down the street...but I'm still running the original plug and I have yet to see a hint of blue smoke from the exhaust. If I ran a 20:1 mix in my snowmobile or weedwacker, they'd be gushing out massive amounts of smoke. In fact, I did use some leftover bicycle premix in my weedwacker and I couldn't stand the smoke. So where's it go in the bike engine? Is there something in the muffler that absorbs it? If so, does the muffler need to be dismantled and cleaned regularily? Anybody else surprised at how little these things smoke with so much oil in the gas?