Speaking of Holleys and such, I saw where Edelbrock is changing things greatly in their business model. One year at Daytona Bike Week, I got to spend a few minutes speaking with Vic Jr. at their display, an interesting time. I was interested in hearing him speak about 'the early days,' when his dad started the company, and they were big-into SCTA events, and the hot rod culture (1950's).
Yes, a comparison of a properly-tuned 2 bbl carburetor against a OEM set would be interesting. My $ would be on the OEM set-up, once it's tuned, being comparable to anything-else normally-aspirated, especially where rideability comes into-play. The VBoost is an ingenious way to have your cake and eat it, too, across the rev-band. A good tuner can tune an engine's carburetion for operation in a narrow rev-range, say, high-output for dragstrip use, but the low/midrange will suffer. If it's a track-only bike, you don't need the below 6000 rpm performance, but I suspect most riders with licensed streetbikes want and need full-spectrum performance.
I have not dynoed it. I believe Damon told me he got 135 out of it but I think that was with normal carbs. I don't think you will see any better numbers with this carb set up since it is a little rich. The motor is just a basic 1300 nothing really special just completely rebuilt . It has to be one of the quietest running Vmax motors I have ever heard.
Working-backwards, a stock VMax produces ~1.5 HP/cubic inch. 1200 cc=74 cubic inches; 74 x 1.5 HP/cubic inch=111 RWHP, which is probably right in the ballpark for a stock bike. The highest dyno reading for a stock bike I have in my library of VMax road tests is 119 RWHP. Since 100cc=6 cubic inches, and 6 x 1.5=9, then 111 RWHP and 9 =120 RWHP for the average.
Working off that 119 RWHP dyno test, and adding the 9 HP, you get 128 RWHP. That's pretty-close to Kyle's estimate of 135. A bit of port work, and maybe upping the compression ratio a bit, 135 RWHP doesn't seem to be out of the question.
I'm sure that Sean Morley could reel-off some impressive numbers for things he's done, and PCW for their Tourmaster 1500 engines.