Not to p*** on your bonfire but................
I have the exact same can on mine (debaffled as well, sounds gorgeous
), and it was dynoed and was showing as running as slightly rich iirc? The previous owner had bought some newer Mikuni jets that I eventually got around to fiiting. Wasn't too bad or difficult a job, but they were only one size (2.5 graduations is it?) below due to the almost same stoichiometric (sp) ratio that the dyno run gave. In a nutshell, you should be fine with the slip-on as has already been said, but it's not 100% spot on for ideal power/torque curves........ HTH