Hi Jools,
I have a Mikuni on my Super Rocket and have only praise for it
Theres a bit more than jets involved in the transplant you are considering!!
There are a miriad of Mikuni needles emulsion tubes and so forth not to mention slide cutaway to select
I would suggest contacting Allens the Mikuni dealers if you are in the UK. 01949 836733
or Sudco Mikuni in California,
http://www.sudco.com/mikuni.htmlHTH
John O R