sounds to me like your slow jets are dirty...try running sea foam through it ....then take the bike out run high rpm's in 2nd gear and back the throttle off real fast...try to suck the gunk out of the jets....what the heck worth a try right....
+1

Except I would use "Techron"

I would too or find a can of BG44. It's expensive, but is a great fuel treatment.In my opinion Sea Foam is pretty much useless. Here is some text quoted from a thread on bobistheoilguy.com and a link to this thread. Pretty much sums up what I have been thinking all along.
"I'll add a few words on the Seafoam cleaner. It contains no beneficial fuel detergents. However it is loaded with alcohol, which when burned gives the impression of better ignition. So it is basically a "one tank wonder". Better to spend your money on a valid polyether amine fuel cleaning product like BG 44K or Techron in my opinion. My motorcycle friends all rave on the Seafoam, but in actuality all it does is burn faster, thus fooling us into thinking it is a wonder drug cleaner. So I got curious and analyzed the Seafoam. It turned out to be just plain isopropyl alcohol, a dilution solvent, and a small percentage of light mineral oil. No significant metal additives or detergents to be found. So...my two cents worth of advice is spend your money elsewhere...
Mikey B.
Gas Chromatograph/Fuels Chemist"
Here is the link....
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1100653Doesn't mean it is fact, but makes a lot of sense to me.
Hope this is helpful
Bob (Not the oil guy one)