Ivan kit and revisit to cold starting

[NitramA]

You can always buy new starter jets if necessary. However it would not be a huge issue if the starter jets were a little larger than Mikuni 42.5 size as they are not in use unless the choke is operated.
Are they stainless steel jet cleaners? I usually use brass wire  from a brass bristle brush as it will not harm the jets.
Never a great fan of Carb Cleaner, much prefer Cellulose thinners, it can tarnish the jets if they are immersed for over a few hours, but certainly dissolves lacquer quicker than carb cleaner.

Having cleaned and compared all the jets they’re all the same size across the carbs so I’m sure they’re ok.
Youre right though, if I’m in any doubt I’ll just buy a new jet.