Origins of the Triumph Thruxton 900 — Classic British Motorcycles — Motorcycle…

9 Апр 2015 | Author: | Комментарии к записи Origins of the Triumph Thruxton 900 — Classic British Motorcycles — Motorcycle… отключены

Related Content

Found on 1978 Triumph Bonneville Custom

Here in the Midwest gotten our first real of the year, and the weather already has u.

is Ride to Work Day!

Monday, June 20, is national to Work Day. Whether you own a Harley or a 49cc Hond.

on eBay: 1977 Ducati

Okay, so maybe we’re in the mood for a Ducati this

Found on eBay: 1978 900SS

Triumph Thruxton

2005 Triumph Thruxton 900

produced:  2004-present

Total  N/A

Claimed power: @ 7,250rpm

Top speed:  110mph

type:  Dual overhead air-cooled, vertical twin

Weight  205kg (451lb)

Price $7,999

BSA produced just Rocket Gold Stars, the pairing of Gold Star parts and 650cc Super engines. It’s said only about 2,000 exist.

Those numbers jibe, of course, and that’s any time a factory assembles a motorcycle using over-the-counter unscrupulous shade-tree mechanics try to make a fast buck by together their own. is the case with the Triumph Bonneville — a bike that Triumph to the winner’s circle the 1960s and inspired the modern Triumph racer, the Triumph Thruxton 900.

Thruxtons were created not only by individuals but by Triumph dealers — at the encouragement. But what is a real

In May 1965, the Triumph factory in England, produced 52 tuned Bonnies to homologate the type for racing. It’s known the 52 came from a batch from DU23129 to DU23181, but production machines were diverted for Thruxtonization. And many built Thruxtons from tuning parts.

Hints of

Okay, let’s get this out of the way up Owner David Haydon be certain whether his 1969-registered Bonneville is a genuine factory or merely a collection of factory parts fitted by a dealer to a Bonnie. But there are several that this is a special

When Haydon bought it, the was fitted with high-compression, pistons — not really suitable for the In the valve train, Haydon Triumph competition shop cam followers, specially designed a larger radius to not only friction loads on the cam lobes camshaft wear was a persistent with production-racing Bonnies), but to valve overlap with the mild cams.

The latter running in needle roller instead of plain, stock an old racer’s trick. Special, pushrods actuated rockers were aligned with and spacers rather than the spring-and-washer arrangement. Valves standard size — as they in the Thruxton racers — but Haydon some machining work in the

Unfortunately, the engine number was no One of the crankcase halves had been and the number stamped on the left is an early unit construction completely out of step with the of the bike’s specification.

Haydon settled on 1969 as the year of manufacture (or dealer based on the United Kingdom registration date and the rest of the equipment. The twin-leading-shoe front is from 1969-70, rather the ventilated, single-leading-shoe 8in brake to the homologation batch; but it’s for cooling — like 1969 racers.

The swept-back headers, the factory crossover and step-down pipes, also were factory race items, the distinctive long mufflers all Thruxtons shared. These built from a United flat-tracker megaphone with the end of a Triumph Saint police welded on!

The alloy gas tank and seat are marked RGM, Haydon assumes to be Triumph Rose Green Motors tank was a 1969 factory Also correct for a Thruxton are the rear wheel, alloy extended intake stubs and oil tank. The frame had no mountings for a or sidestand, and the transmission contained a gearset. Only the original GP carbs are missing, replaced by Concentrics — but such a swap was at the time.

Period pictures of especially Malcolm Uphill’s second-place Barcelona bike and of Man Production TT winner, show a similarity to Haydon’s Bonnie.

The name, the race

Opened as a Air Force base in 1941, airfield, near Andover, was transferred to the United States Air Forces on March 1, 1944. there, the 266th Fighter P-47 Thunderbolts flew … missions in support of the landings and continued strafing and … roles after the were taken. Later in the when it became possible to use airfields, the group was transferred to

At the end of hostilities, Thruxton became a airfield (which it remains), its potential for motorcycle racing was exploited with construction of a circuit. By 1951, it was sufficiently to host a six-event motorcycle program as part of the Festival of World Champion Geoff won the 12-lap Invitational race, predictably.

But second across the line was 17-year-old newcomer Surtees, who would go on to win seven championships.

In 1955, the Southampton Motorcycle Club held its nine-hour endurance race at Noted BSA tuner Eddie Dow and E B Crooks placed first, a Gold Star 500. The year, BSA’s famous took the top six places.

Triumph Thruxton 900

In 1958, the became 500 miles, and the first at this distance were “the Bike” Hailwood and Dan on a 650 Triumph, the first of many Triumph became the bike to

It’s easy to underestimate the of endurance racing to the average motorcyclist in the Sixties. Grand racing and even the TT races dominated by machines bearing resemblance to road bikes and by huge factory support. The 500 offered amateur racers and tuners a chance to show stuff.

Typical of the entrants was the 1958 sponsored by Lawtons, the Royal dealers in Southampton. With Bob as lead rider on a 700 Constellation, the placed second behind and Storey with another in third.

Hailwood’s 1958 win was the of eight outright Triumph only Norton, with six came close. In fact, in the 15 of the 500-miler (the last run at Thruxton was in 1965), Triumphs 19 of 45 possible podium places. In they took five out of the six places, including the top three.

The Bonneville

It was Doug Hele’s at Triumph in 1962 that development of the Thruxton. While at Hele masterminded the 500cc and the 650SS production racer. The won outright at Thruxton in three years to 1964 — but in that the first of Hele’s hand-built, Bonneville racing prototypes was at Meriden, placing second in the race.

Hele could a one-two.

In order to properly the Thuxton for production racing, was obliged to make it available for To produce the single batch of 52 at Meriden in May 1965, standard were pulled from the line, stripped and hand with special Thruxton Although horsepower gains modest — 54bhp against the Bonnie’s 46 — the careful assembly dramatic gains in reliability.

In any regular Joe could put down the 30 pounds or so over a stock 357 pound sticker price $925) and order a Thruxton. In however, few got beyond the dealer teams. (In order to satisfy racer” rules, only — not the factory — could enter bikes in the 500-miler.)

After 1965, the picture got still. Thruxton tuning were available through the Triumph dealers — again, in — but few were ever traded the counter. Hele continued to the specification, improving power, and reliability until 1969, the Thruxton Bonneville’s finest

As well as the 1-2-3 finish in the race and the second place in Barcelona, a Thruxton ridden by won the Isle of Man production TT at an average of 99.99mph, with a flying lap at than 100mph. In recognition of and in a shrewd piece of marketing, renamed its K81 tire the TT100.

In Triumph and Hele refocused racing effort on the new 750cc and almost identical BSA Rocket3, the Daytona 200 in 1971 and five Production TTs thereafter. But that’s story for another issue of Classics.

2005 Triumph 900

The new Thruxton may be the motorcycle world’s to retro musician Brian Like Setzer, who rode the wave in the Eighties with The Cats and helped launch the revival of the Nineties, Triumph’s bike hits a lot of the right

But there are those who question Setzer is an inspired artist or an imitator, and the same issue has raised about the Thruxton.

the good news about the The new Thruxton is a hopped-up version of the Bonneville platform complete a bigger engine (865cc to 790cc), hotter cams and and megaphone-style exhausts. Revised geometry and longer rear steepen the steering angle, and handlebars and rear-set pegs for a more aggressive riding

Read practically any review, and the “fun’’ comes up repeatedly.

The is that unlike the original, the not the biggest badass on the block. a claimed 69bhp and an estimated top of 110mph, it certainly won’t with modern superbikes.

line? The new Thruxton is as close as a schmo can get to a piece of Triumph without selling a vital and buying a Sixties version. And makes it pretty cool in our MC

Triumph Thruxton 900
Triumph Thruxton 900
Triumph Thruxton 900
Triumph Thruxton 900
Triumph Thruxton 900

Interesting articles

Other articles of the category "Triumph":

Our partners
Follow us
Contact us
Our contacts

Born in the USSR


About this site

For all questions about advertising, please contact listed on the site.

Motorcycles catalog with specifications, pictures, ratings, reviews and discusssions about Motorcycles.