my 06 is all fat tired and all the fun stuff. It gets old though....
Perfect simple, cheap, build in my opinion consists of
2006 or newer ECU and jet needle
5 gram clutch weights
6 inch extension (puts more weight on the front tire, less squirly)
~45 on flats,,,,, about the setup I did on my uncles and it is perfect.
I was just saying that the fat rear tire gets old after a while. It's like driving a lowered car, kind of a pain. My 08 is modded but stock sized tires still,, I love it.. So I'm thinking about going back to normal with this one...
Building this was a lot more fun than riding it. Everyone seems to love it, but it just doesn't handle well obviously.
45mph is good. In NC I was doing mid 40's...and peaked at 51-52mph. Here at Altitude I average 38-39mph, but I'm gonna go up one more jet to see if it helps.
If I had a chance to start from stock, I would just change variator, slider weights, and CDI.
Go down a jet for higher altitude. Also I don't know what weight rollers you are using, but try going a gram lighter and see how the bike reacts.