ok i rode today...i was able to get up to 68mph in 6th gear with some pretty strong cross wind. this is with 15t front and 52t rear sprockets. this small change has made acceleration a little better as well. 6th gear is alot more useable on the street now.
my bike already has the cam adjustment kit on it and has been rejeted...it seems likke there are some jetting improvements to be made...also the muffler has been gutted from what the original owner told me.