Period-correct old timers are becoming rarer by the day. So we need guys like Hayden Roberts: craftsmen who live and breathe classic motorcycles. He’s a British transplant living in Santa Paula, California, where he repairs and restores old British iron under the Hello Engine banner.
Hayden gives us the skinny: “I’d been collecting parts over the years and wanted to build the desert bike I’d always hoped to find stashed in a shed someplace. The idea was that every piece had to be original, no reproductions, and was there to serve a purpose: a race ready desert bike, no filler.”
Hayden’s Triumph is a ‘bitsa’ like no other: a textbook example of how to build a desert sled. The frame’s a 1964 TR6 unit—but it’s not stock. Hayden braced it at the steering head, strengthened it, and raked it out an additional three degrees for stability. The seat loop was bent up too, and the rear section de-tabbed.
“The front forks are heavily modified,” Hayden tells us, “as the original equipment was basically a pogo stick.” This setup uses 1950s Triumph fork sliders with modded internals. Hayden added a shuttle valve, lengthened the dampening rods, added new bushings, and replaced the springs with heavy-duty progressive items.
For wheels, Hayden started with a late 50s to early 60s BSA Goldstar front, chosen because those were lighter than the Triumph offerings from that era. The rear is a mid-60s Triumph wheel, paired with a Webco overlay sprocket. The front tire is an impossibly rare 19×4” Avon Trials Supreme, and the rear is an 18” Avon Gripster from the same era.
The back half of the timing cover was slashed off, and the rear of a pre-unit 1950s motor welded in. “This enables you to run a Lucas competition magneto instead of the stock alternator set up,” Hayden explains.
To get the conversion to work, he had to add the magneto gear into the interlocking gear sequence in the timing case. Apparently, there’s no room for error: “Too far apart and the teeth on the gears won’t mesh; too close and they won’t turn.”
Hayden had a set of N.O.S. Webco valves and springs, so he added those too, along with a set of forged 10:1 pistons. “The motor turned out really rev happy and is a ton of fun all through the range,” he says.
“These use a metal gauze and a replaceable piece of filter material. It replaces the stock left side cover and battery tray and tucks in out of the way. For me it’s the best looking of the air filters, like it belongs there.”
Then there’s the impressive finishing kit. The seat is an original Bates race seat, hard-mounted to the frame for extra strength. Since it’s not hinged any more, Hayden had to modify the oil tank with a side filler.
The controls consist of Stelling and Hellings bars, and 1960s Camco grips with a leather ‘donut’ on the throttle side to prevent blisters. Hayden ran all the cables through lengths of braided fuel line—“an old desert trick that protects them from getting kinked if you drop the bike, or catch it in the giggle weeds.”
Hayden’s dubbed his sled the ‘Desert Fox,’ a nickname given to racers like Bud Ekins and Larry Berquist back in the day. It’s portrayed by a hand-painted fox graphic on the fuel tank—a riff on the old leaping tiger logo of the 50s.
The patina and shed-built vibe conceal just how technically awesome this Triumph is. Back in the day, it would have been cutting edge. But right now, it’s a lovingly constructed reminder of the golden era of desert racing.
Long live the Desert Fox!
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