just something to think about... you would probably get better performance running a lower grade octane. Im not sure your compression but I don't think you have anything too wild. High grade on a stock or mildly modified motor is actually counter-productive sometime. Something to think about. I used to be the "run premium or better in everything" guy but then I did a lot of research and found out that I not only got better performance from lower grade, but I also got better mileage as well. The rule of thumb is you want to run the lowest grade possible without detonation.
this might help you on the jetting. And also, when you jet, start with your pilot circuit first, then move up from there. Get it running, warmed up and set your idle a little high... then play with your air screw until you get the fastest idle possible and leave it there. Then shut it down and count your turns out on the airscrew. If it isless than one turn out, go bigger on your pilot, if it is more than 2-2.5 turns out, go smaller on your pilot. (or maybe its the other way around - someone wanna chime in>) then go from there.
- Justin