My usual method, if I'm not sure which way to go, is to buy one richer and one leaner jet, and try them to see if I can get a directional indicator. Then if I find out which way(richer or leaner) gets better, I fine tune it in that direction.
Because of altitudes and temps, your jetting might not be the same as somebody else's recommendations. It might vary somewhat from what is best for them. That is why I always ask for altitude and temp info when somebody has a jetting issue.
I hate to let a carb beat me, but if you feel like you have had enough and want another carb, I have plenty of experience with the Mikuni TM32 flat slide, and can help you alot better with tuning that carb. And that is one helluva carb, too. And it is not very expensive.
And just so you know, I have heard some scuttlebutt about that 30mm OKO/JRCcarb on the web, that it has too small of a float bowl, and it starts to starve the bike for fuel (running out of power) at large throttle openings. I don't know if that is true because I haven't run that carb, but I have heard the stories.