1950s Classic Motorbikes Archives

Harley-Davidson Sportster

The Harley-Davidson Sportster is a motorcycle institution. It first hit American highways in ’57. There has been many a model since – and the Sportster line still shows no sign of stopping. Throughout its venerable run, it has given many a new rider a first taste of the biker brotherhood. The Sportster has long held pride of place as the entry-level Harley. Pared down to bare biking bones, it has always cut straight to the chase. By ’62, the Sportster was dishing up 55bhp – at 5,000rpm. That was thanks to its iconic V-twin engine layout. The motor’s stroke, at that point, was a tall 96.8mm. That translated into hefty dollops of acceleration-laden torque. Top speed for the Sportster, in the early Sixties, was 110mph.

The XLCH Sportster weighed in at 485lb. That was light enough for a skilled rider to cruise through corners with relative ease. While hardly a sports bike, by modern standards – back in the day, it was a lithe and agile ride. Before the Sportster, British-built bikes had been the only way to go – at any sort of speed, anyway. So, the Sportster was a welcome addition to the roster of quick and capable roadsters on offer.

The Sportster has long been a mainstay of tidy, uncluttered design. As with any bike, the focal point was its small – but perfectly-formed – fuel-tank. Alongside it were a diminutive headlamp and relatively low-set ‘bars. At least, as compared with many a custom-style machine. A single seat – and slender fenders – were in keeping with the Sportster’s minimalist approach. In many ways, then, the Harley-Davidson Sportster has been the bedrock of this most prestigious of two-wheeled marques. Long may it continue!

BSA A10 Golden Flash

The BSA A10 Golden Flash first appeared in 1950. In terms of engine layout, it was a classic British parallel twin. BSA were based in Birmingham – at the Small Heath factory. ’71 saw the iconic marque hit the financial buffers. Mercifully, it was bailed out by the Norton Villiers Triumph conglomerate. By that point, though, BSA’s best days were behind it. As if to clarify that, the last BSAs off the production line wore the Triumph logo!

The Golden Flash wrote the book on practical. British-built bikes had been known to deposit the occasional oil leak, back in the day. Not so, the A10! Economical and efficient, it was eminently reliable. Its 35bhp engine delivered user-friendly power. The A10’s top speed was just a tad shy of the ‘ton’. As far as handling went, the ’54 model A10 sported a shiny new swing-arm. That was a big step up from its plunger-suspended predecessor.

On the visual side, the Golden Flash was a good-looking bike. Its BSA motor alone was a metallurgical masterpiece. Exiting it, sweetly-shaped down-pipes splayed around an intricate semi-frame. In both engineering and styling, then, the BSA A10 Golden Flash displayed the best of British design. Flash, by name, yes … but certainly not by nature!

Ariel Square Four

The Ariel Square Four was designed by Edward Turner. His finest hour was yet to come. He would go on to oversee Triumph – in its Sixties glory days. The first version of the Square Four, though, was released in ’28 – back when Bonnevilles and Tridents were but blurs on the ‘Brit bikes’ horizon. Square Four referenced the bike’s 1,000cc motor. It was, in effect, two sets of parallel twins – one in front of the other. The exhaust port was shared. The downside of that layout was that – while the front brace of cylinders enjoyed lots of cooling air – the rear two did not. That could make them a tad recalcitrant – especially on hot days!

The ’58 model Square Four was good for 105mph. Warp-factor speed for a road-bike, at the time. And – by definition – more than enough to keep ‘ton-up boys’ entertained. They were the 100mph Rockers – who had the occasional contretemps with Mods. Turner – and Triumph – would do brisk business with them, in the coming years. What made the Square Four’s top whack stat still more impressive, was its weight. 465lb needed careful coaxing through corners.

As its name suggested, the Square Four was a solid-looking motorcycle. In the sense of impressively robust, that is. Its telescopic front – and plunger rear – suspension units complemented each other nicely. The four-header exhaust set-up sat neatly between the two. The ‘Squariel’ – as it was affectionately dubbed – soon took its place in the rapidly-growing roster of popular British bikes. All in all, then, the Ariel Square Four can hold its head high. Even in the company of the mythical machines toward which Edward Turner was moving!

Douglas Dragonfly

The Douglas Dragonfly broke the motorcycle mould. BMW is now almost synonymous with the flat-twin layout. Other marques, too, though, have used that venerable engine configuration. Not least, Douglas. The firm was based in Bristol, England. Its early models saw the motor fitted inline with the frame. The two pistons went at it hammer and tongs – ‘punching’ fore and aft. The Dragonfly, though, saw them slung transversely across the frame – à la BMW ‘Boxer’. In any case, the Dragonfly made good progress – cruising at around 60mph. Beyond that optimal speed, however, performance tailed off dramatically. Ultimately, that would lead to the Dragonfly’s decline.

Design-wise, the Dragonfly was on solid ground. If anything, slightly too ‘solid’, perhaps. Is it just me. or does the way in which the headlamp nacelle flows into the fuel tank look a bit like the front end of a dragonfly? Certainly, the Earles forks – and robust rear shocks – visually complemented each other. And – above them – the bike’s logo was elegantly scripted. The Dragonfly’s flat-twin powerplant was itself impressively wrought.

In ’23, Douglas won at the TT. It was in the sidecar category. Freddie Dixon did the driving. Again, that historic outfit’s boxer motor was installed inline. The year before, on the Island, a Douglas solo racer had been fitted with a delicate-looking little disc brake. Douglas, then, were innovating – technically and stylistically. And – when it comes to nomenclature – the Douglas Dragonfly must be one of the most poetically titled bikes ever. Buzzin’, basically!