Have had Mikuni VM30 Roundslides on my '78 Bonnie now 4 + years and have no complaints.
The kit comes with the manifold stubs which may have to be trimmed for length (mine were) and also came with radiator hose (not good) to connect.
You will need new cables to match the jap to england ferrules depending on what type of splitter or twist grip setup you have.
Bear in mind you will have two left hand carb's as they are not 'handed' like the Anals.
Best modification in my book - not for the purists.
Just replace the pink overflow hoses with clear and file off the
'Made in Japan' over the float bowl of the r/h carb!