a cheap way to get mukuni VM carbs is to buy a used set off of kawasaki h1's. A little smaller than 28mm (26mm I think?) but they are there, easy to rebuild, easy to tune, and I think you can use the K0 cb750 4 into 1 cable to operate them on a inline 4 engine.
not that triple parts are cheap these days, but the later 73-76 H1s and KH500s are still inexpensive.
not that triple parts are cheap these days, but the later 73-76 H1s and KH500s are still inexpensive.