@hidalgo ! First of all, i really appreciate you taking the suggestions well
Strictly speaking as a general consumer ... i think users will be deeply interested in a "engine comparison with competition". One doesn't need to be deeply technical about how engine works. But just telling them "the difference" (in HP, Bore, Stroke, Reliability, Tuning Intervals etc) will create a much better and deeper impact on the opinion of the viewer.
For example, we all know that Piaggio's engine has a higher compression than a CG125 engine (not sure if true if compared with Deluxe, but as its website states, compression for both CG125 and Deluxe is the same). Also, its Gear Ratios which truly create an impact for being 5 geared bike. And not just telling them "its the best" but telling them "WHY" its the best. I'd use the words like "maximum value for your money".
But thats just me. You guys are a group. I am sure you can think of better things
Also, to add ... i have noticed that you don't rev the bikes. You should. Rev it fully when its parked. Show the RPM needle on camera, and let the engine sound be heard. Viewers will definitely enjoy this one.
If you have a Drag Strip or an Open Road near your area, take the ride for a Spin, with a camera and do some Drags.