Did you need to do any modifications to the bike or is it a bolt in swap?
It is a bolt in transmission, no mods required. I did not do the work, I have a great Indy shop. I went with the 28 tooth to keep 1 thru 5 the same. The bike will accelerate well in 6th over 70 mph. Slight increase in gas mileage when highway driving, no change around town.