Stock carb? I would say maybe get u a couple size bigger pilot and main just make sure it doesnt lean out on ya. Do a plug chop to make sure! Itll sorta be hit and miss till u get it right but shouldn't be far off stock if u haven't had any porting or added exaust or air intake.
I'd say just a size or two over the current jet would be needed if any change is needed. As said above do a plug chop and see how the jetting setup is.
Cool. I bought a bunch of plugs today for that very thing. And yes, it is the stock 26mm Mikuni carb. Would I be better off staying with this carb or maybe spending a few dollars on a cheap 30mm flat slide carb like a OKO?