If we are old enough to appreciate and ride a Silverwing, haven't we heard some two wheeled characters in our past. One example that comes to mind to me, was the Suzuki RE 5. It was rotary engined bike from the 70's, that had a very unique sound. Two stroke singles, twins, triples, oval piston Honda's, three cylinder BSA's, Wizzers,Puchs....... so many bikes, so many exhaust notes. There was a Triumph/Suzuki shop 2 blocks from my home, and as a child, I swear I could tell the difference between a single carb Triumph tr-6, and a dual carb Bonnevile..... as they would pass by.... with my eyes closed.!
Your choice for a "Unique sounding two wheeler"???? Jeff.