I read a post somewhere and cant find it now. But i have been hacing trouble with getting it to run just right. then i heard that the mixing ratio would make a big diffrence in tuning. I have been mixing at 40:1 with normal AMS and no matter what my jetting is the plugs are right black all the time. i now have 280 and 22.5 and clip on 1 and it still is black as night. would changing it back to 33:1 make that much of a diff in tuning it??? I am afraid to go leaner as thats getting lean already but the plugs still read black not wet or oily just black. and ther still seems to be a bog on the low end. I thought these sleds were supposed to run with 35 pilots when set up for pump. mine wont run close to a 35 as thats WAY to rich.