Frankenstein makes a great unit for Sporty's I have done one on a 05 883, this was 38" Sport set up. its light and worked well on the 883. the bike has been upgraded to a 1250 and still performs well,
Keep within the recommended tire specs on the rear and you should be all good
I install Frankenstein and Mystery Designs, Like the Frankenstein for weight, cleanliness and just all out cool if you own a hotrod trike, More people will come up and talk your ear off.
HB