don't know if its any good but i'm pretty Shaw when i was a nipper people use to use a carb from a yam 250/350lc .if that's no good try one of the gilera runner tuning sights they do bigger carb kits but knot Shaw what sizes the go up to ...
cant see why that wouldn't fit fine with a larger manifold intake. They do it with and without a vacuum tap, not sure what the dt needs. i run this on my rs125 and it performs great