1960 Triumph TR6

1960 TRIUMPH TR6 NOMENCLATURE
1960 is the first year when Triumph TR6's received -"A" or -"B" suffixes. The TR6A became the Roadster with low pipes, and the TR6B retained its former identity as a dirt bike/desert racer/enduro/street scrambler with high pipes. 1960 Triumph TR6 engine & frame numbers came in two batches: the first being 029364 to 029688, with production dates running from September 3, 1959 to June 29, 1960. The original price new was 271 British Pounds.

NEW DUPLEX FRAME REPLACES 'WHIP IRON'
Triumph Motorcycles adopted a swingarm rear suspension in 1953 & their first attempt at a frame was poor, at best. With meager support of the swingarm pivot points, these pre-unit twins were known for their evil handling. The high speed weaving could be so bad that the frames earned the nickname "Whip Iron". With the introduction of increasingly more powerful machines, culminating in the 1959 Triumph Bonneville the problems just got worse. This forced the adoption of an all-new frame, just 3 model years before the wholesale redesign of the entire machine when it went unit-construction in 1963. The new frame had twin front downtubes, earning it the moniker of the "Duplex Frame". It too had it's problems, with early version suffering cracked steering heads, quickly remedied with the addition of a second bracing member under the backbone. In the interest of tightening up the steering, the rake angle was reduced from 25.5 degrees to 23, which shortened the wheelbase to 54.4 inches. A whole new set of engine plates were required. The front forks were also redesigned adding 2-way damping & reducing spring friction.

1960 TRIUMPH TR6 ENGINE CHANGES
The 1960 Triumph TR6 got a new alternator, along with new crankcases deleting the old dynamo drive aperture. The engine sprocket dropped from 24 to 22 teeth, made necessary because of the new 43-tooth rear wheel sprocket. The new crank-mounted 6-volt alternator provided lighting, but ignition spark was still provided by the battle-proven Lucas K2FC magneto, mounted as always behind the cylinder block, driven off the intake cam timing gear.


1960 Triumph TR6 SPECIFICATIONS


Engine type

Displacement

Bore & Stroke

Compression

Carburetor

Ignition

Engine output

Primary drive

Primary sprockets

Clutch

Gearbox

Ratios, overall:

1st, bottom

2nd

3rd

4th, top

Final drive

Final drive sprockets

Frame Type

Suspension, front

Suspension, rear

Brake, front

Brake, rear

Tire, front

Tire, rear

Wheelbase

Seat Height

Ground Clearance

Fuel capacity

Dry weight

Air-cooled OHV vertical twin, non-unit

649cc / 40.0 ci

71mm X 82mm / 2.79" X 3.23"

8.5:1 (US & export); 7.0:1 (UK)

1-Amal Monobloc

Lucas magneto

42 bhp @ 6500 rpm

1/2" X .335" X 5/16" chain, 70 links

21T X 43T

Multi-plate, wet

4-speed constant mesh, right foot shift


11.2:1

7.8:1

5.5:1

4.6:1

5/8" X .400" X 3/8" chain, 101 links

18T X 43T

Brazed lug, rigid

Telescopic fork, hydraulic damping

Swing arm, 2 Girling dampers

8" SLS drum

7" SLS drum

3.25" X 19" Dunlop

4.00" X 18" Dunlop

55.25" / 140 cm

30.5" / 77 cm

5" / 12.7 cm

3 Imp gal (US); 4 Imp gal (UK & export)

380 lbs / 173 kg


MORE TRIUMPH TR6 PAGES:
Triumph TR6
Triumph TR6, Pre-Unit (1956-1962)
.....1956
.....1957
.....1958
.....1959
.....1960
.....1961
.....1962
Triumph TR6, Unit-Construction (1963-1970)
.....1963
.....1964
.....1965
.....1966
.....1967
.....1968
.....1969
.....1970
Triumph TR6, Oil-in-Frame (1971-1972)
.....1971
.....1972
Triumph TR7
.....1973
.....1976

OTHER TRIUMPHS:
Triumph Bonneville
Triumph Trophy
Triumph Tiger
Triumph Thunderbird
Triumph Trident
Triumph X-75 Hurricane


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TALES OF TRIUMPH MOTORCYCLES & THE MERIDEN FACTORY


COMPLETE BOOK OF CLASSIC & MODERN TRIUMPHS


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BONNIE: THE DEVELOPMENT OF THE TRIUMPH BONNEVILLE


TRIUMPH SPEED TWIN & THUNDERBIRD BIBLE


HINKLEY TRIUMPH TRIPLES & FOURS ESSENTIAL BUYERS GUIDE


TRIUMPH PRODUCTION TESTERS’ TALES FROM THE MERIDEN FACTORY


TURNER’S TRIUMPHS: EDWARD TURNER & HIS TRIUMPH MOTORCYCLES


TRIUMPH TROPHY BIBLE


HINKLEY TRIUMPHS, THE FIRST GENERATION


BONNIE: THE DEVELOPMENT OF THE TRIUMPH BONNEVILLE


TRIUMPH: A CENTURY OF PASSION & POWER


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CONENTRY’S BICYCLE HERITAGE


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TRIUMPH SINGLES: EARLY DAYS TO 1974 BY ROY BACON


BRITISH MOTORCYCLES: TRIUMPH


TRIUMPH MOTORCYCLE RESTORATION, PRE-UNIT


TRIUMPH PRE-UNIT TR5, 5T, 6T, T100 & T110 FACTORY SHOP MANUAL


TRIUMPH MOTORCYCLE RESTORATION


ILLUSTRATED TRIUMPH MOTORCYCLE BUYER’S GUIDE BY ROY BACON


FACTORY ORIGINAL TRIUMPH TWINS 1938-1962


TRIUMPH BONNEVILLE: PORTRAIT OF A LEGEND


TRIUMPH 650 & 750 TWIN REPAIR MANUAL 1963-1983, BY HAYNES


TRIUMPH MOTORCYCLES IN AMERICA


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TRIUMPH MOTORCYCLE OWNERS HANDBOOK, ALL MODELS 1937-1951


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TRIUMPH WORKSHOP MANUAL FOR 750 BONNEVILLE & TIGER


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TRIUMPH 650 & 750 UNIT TWINS 1963-1983, HAYNES REPAIR MANUAL


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TRIUMPH PRE-UNIT TWINS WORKSHOP MANUAL


TRIUMPH 350/500 TWINS WORKSHOP MANUAL






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