I did this mod last week. Highly reccomend it, it pulls hard to the rev limiter and wheelies really easy in first, be carefull, you cannot keep it pinned in 1st gear, you will have to chop the throttle. The Kawi engineers must have choked it on purpose because the in take runner boot measures just over 43mm inside and has a 40mm body on it.
Area P full system, PCV, BMC, 44mm bodies flies out. I'm running it without map in the PCV until it's dynoed based on the info from 9SecVMax.
Paid $220 for the TB's on ebay including shipping.
Removal- After tracking the part FedEx I took the old TB's off the night before the new ones arrived. Took me 1.5-2.0 hrs. Remove tank & both side farings. You'll need to remove an engine brace on the LH side. Pull the rubber velocity boots out the airbox/frame access holes. Remove the rubber gasket around the velocity boots will give you another 1/4" clearence on the bottom side to get them out, you'll need it. I fished them out the LH side.
Install- took me about 3 hrs. I swapped the fuel injectors and had to drill & tap the throttle linkage for the cruise control. The cruise control addded 30-45min to the job since the cable brackets had to be removed and re-installed. After getting the throttle bodies in position they are a little tough to get down on the intake boots. I put a piece of 1/4" nylon block I had laying around between the tops of the TB's & the airbox/frame. This way I could pry & apply pressure evenly across all 4.
Test ride- better than prom night.