I bought these Mikuni VM30 performance carbs in 2014 from WiredGeorge carburators. He stopped making these several years ago. He bored a set of stock VM26 carbs to just over 29mm, cut the bottom of the throat so the slide will fit correctly and some other internal mods which he would not disclose. I ran these in 2014 on my ELR clone before switching to the RS36. I sold the ELR and built up a KZ900 which I just got running. I got them dialed in but they are just to small for my current engine, I bought a rack of RS34 to replace them with.
They are in excellent / new condition, Jets are 17.5 pilot and 120 mains. $350 + shipping.