Jetting is always a trial and error deal. To many variables to say what will work for you.
In my case the 35/115 combo work well. I have run this set up along with a K&N filter, on a rather long intake runner, since June of 2012 when my odometer read 366 miles. My original spark plug looked like this when recently replaced at 12,000 miles.
http://scootdawg.net/picture.php?alb...&pictureid=760
As far as top speed goes.....I have no idea what mine will do....never attempted to find out. It climbs the hills I live in very well, hums along nicely at 40mph, and averages over 80 mpg. I can't ask for any more.