IF the problem is purely jetting and it wont pull it's a lot wrong, like 4 or 5 sizes wrong.

Mine (forget the numbers, it's a '28 ) runs 182-188 right now and is pretty much spot on for a safe summer base. It's was also useable but soggy 188-192 and if jetted on the day for a hot TD/race would probably end up around 178 or so.
That's a big range where it runs alright, it's also run std pipes, airbox and various intake mods anywhere in that range and always been OK. Not very crisp around 190 and not very safe around 180 but not far enough out to not work.

If your certain it's setup drop it down a size and see if it's better, or if you're scared, go up a size, see if it gets worse, just write it all down, air temp, jets, other mods, how it went etc. then you'll get a feel for what's what.
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Please do not PM me technical questions, if you can't find it on the Forum start a thread