..I'm not picking on Harleys, since many of my friends ride them, but are not some of those engines by Suzuki and Kawasaki, etc. ..a bit more advanced in design and engineering?
I know the Harley Loyalists today's engineering somewhat outdated feel strongly attached to the big thumping twin..likely for nostalgia as any other reason... But hasn't the advanced engineering of today produced more refined and efficient designs?
Admittedly, I am no authority on motorcycles, but I see certain imported bikes that can out perform almost any Harley, and likely do it on less fuel
than any Harley...and do it more quietly and smoother running in the process.
It seems , and correct me if I am wrong..that a Hayabusa 1340 cc 4 cyl engine, producing 188 hp, may be more advanced than an 1868 cu in twin, producing 93 hp..
..And tha Hayabusa engine has been tuned down in power to satisfy Euro enviro standards.
Again; not bashing Harley, since it is obviously the first choice of many, and even Indian has elected to reintroduce their big twin *bikes again.
..And they are doing it with a 116 cu in V=twin