In 1969, if you wanted a serious motorcycle, you bought British. Triumph's Bonneville T120 was the benchmark twin, a 649cc parallel-twin producing around 46 hp that could push its rider past 110 mph.

Motorcycle fenders look great on traditional roadsters. Popularized in the 1950s on East Coast highboys, they served a practical purpose (complying with fender laws and avoiding getting soaked on wet ...