Harleys all use a single pin crankshaft but for various reasons Honda with the 1800 VTX uses a split crank that results in a different sound. The Harleys all sound like "potato, potato, potato," whereas the Honda VTX and many other Jap bikes sound different with a less pleasing sound, more of a “bang, bang, bang” sound. Also, even another V-twin that may even have a single pin crank like the Harley will probably sound different because of a different angle of the cylinders. The Harley sound can be imitated but the clones never seem to really sound the same.
Now don’t get me wrong, I still think Harleys are no where as good a motorcycle as any typical Jap bike, and I don’t like the image of the Harley rider as I have previously described, but they do have the right V-twin sound. That sound is often imitated but it is never duplicated exactly.
Would I buy a Harley? No, it’s the hi-tech touring bike for me, like the Honda Goldwing. I like my XM radar, CB, dual GPS's, cruise control, CD, auto-tuning radio, WX channels, reverse gear, anti-lock linked brakes, tubeless tires, hydraulic clutch/brakes, and 2-up rider comfort at 100 MPH.
If Harley made a jet, would anyone fly it? NO way! So there is your answer as to engineering and quality control. The Honda Jet will be flying soon. There is no Harley jet.
Ride safe! Live to ride! Ride to live!