Duplex Digger: Karl Ardo’s Pre-Unit Triumph Chopper… In 1960, the twin-carb Bonneville 650 received a new “Duplex” frame whose twin front downtubes corrected the “Whip Iron” wobble of the original bike. Today, the 1960-62 Triumph […]
Tag: Triumph Preunit
Preunit Bobber: 1960 Triumph Bonneville 650
Karl Ardo’s Preunit Bonnie Bobber… The original twin-carb pre-unit Bonneville 650 was a sales success, but Triumph had hurried the bike to market. The biggest deficiency was the single-downtube frame, which wasn’t quite strong […]
Australian Triumph: 1950 TR5 Bobber
Black Cycles x PopBang Classics build a Pre-unit Bobber… In the first half of the 20th century, the traditional way to build a motorcycle involved bolting together a separate engine and gearbox via a third […]
