op, with v&h pipes and a k&n filter on my '99 1600 i purchased a dynojet stage 2 jet kit which are intended for bikes with modified air intake and exhaust. after a good carb clean and an install i did some test rides and bored my main jet by hand until it felt the way i wanted. i don't recommend quite the route i took as it is a lot of work and purpose based however most stage 2 jet kits should do the trick for you.
'99 roadie / '88 Cagiva wmx250
/ '00 kx85 / '04 xr50 fullmod / '16 kodiak 700