Andy yes the polini sure adds some extra mph! I've been following your thread too so it really helps me benchmark the ruckus's performance given similar altitude, temperature and O2 concentration. For the life of me, however, I am still trying to figure out how you're using 38/80 jet combo while I'm using a 35/78 jet combo and we arrive at nearly the same top speed (therefore similar power figures). I would really like to further open up the intake and take advantage of that 80MJ like you to make a bit more power.
I checked your altitude today, you're at about 2200 ft and I'm around 3500 ft. Combined with the fact I've opened up the carb and run a much larger intake runner could be the reason for the different jets.
You are running a bit faster than me. I think the fact your not stretched and am on basically stock tires could be the 3-5mph difference.
Try a set of sliders in the Polini. It's a LOT better! They throw the bike up over 8000 rpm quickly!
Thanks for the tips. I'm defenitely cutting that seal out tomorrow!! Might even consider drilling out those clutch holes.