Did this a few weeks ago, a Classic with a Thunder BAK with the stock air box cover, Thunder intake gasket, Cobra full exhaust and fuel only PCV, the dyno tuning was done in the "advanced mode" so each cylinder could be mapped individually.
Nice gains but a few things I notice.
First, peak torque and H.P. occur at a lower rpm as compared to the Vaqueros/Nomads I have had on my dyno. Peak torque occurs at around 2600-2800 rpm vs 3000-3300 rpm for the others.
Peak H.P. occurs at about 4600 rpm vs 5000-5200 rpm for the others .
After the rpm where peak H.P. is produced there is a pronounced drop off of the power not typical of the Voyager/Vaquero/Nomads. We see this on the sportbikes and is usually indicative of the need to meet noise standards. Noise testing is performed at half the rpm where peak power is produced. The lower the rpm where the peak is the lower rpm where the noise testing is performed. Maybe due to the Classic's exhaust being entirely on one side of the skoot prolly has the biggest influence on getting the Classic to meet the sound regs. I checked part nmbrs for cams, cam sprockets and between all 4 models are the same. Throttle body part nmbrs are different but all are 42 mm so those won't be a factor.
More than likely Kawi has severely retarded the ignition timing starting at around the 4600 rpm, this is exactly how Honda does on the CBR1000RR's, unfortunately due to this PCV being "fuel only" I did not have the opportunity to play with timing.
Still nice sound and good gain in performance.