13/42 to much gearing 14/42 to little on take off 14/43 good all around power for the street. best power i found from 4000 to 8500 rpm.

 

I just got in a JT Sproket 46 tooth rear and, a 15 tooth front IF I ever get the power levels up on my little ride (right now it's sitting on a shelf in the garage waiting for the big bore upgrade). For the time being, I'm staying stock on the front and will go to the 46 tooth rear once my chain comes in. I'm hoping this will give me a little extra oomph in the sandy washes and for take off's at the stoplight when I'm on the street. Top end freeway speed"might" suffer a little but, I don't like riding this little guy above 55MPH true ground speed anyway so, dropping the "overdrive" factor a little seems like an easy choice for me.

 

13-45 for the win. Oh and 7-8 grand is the sweet spot on these bikes after pipe, jetting and gears.