don't feel right
 

hi.
unsure how to explain this but here goes.
750ss bobbed with pod filters 2 into 1 exhaust.
starts fine little bit of misfire when cold :confused: but generally ok
when riding its fine under load but when i'm being steady it sounds feels like its burbling and the only way out of this is to down shift but then the revs feel too high.
carbs have been off cleaned, new idle screws fitted.
i'm assuming jetting or carb probs but am i missing something.
:(

Couid try different exhaust lengths

think it might be the way to go.
i'm bidding on some cheap ones on ebay, hopefully it might just be that.
cheers