1960 TRIUMPH TR6


1960 Triumph TR6, triumph tr6, triumph motorcycles, triumph trophy, triumph bonneville

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:




MODEL DESIGNATIONS:
1960 Triumph TR6A Trophy....................... Roadster
1960 Triumph TR6B Trophy....................... Street Scrambler

ENGINE:
Engine type....................................... OHV vertical twin
Horsepower at RPM............................ 42 BHP @ 6,500 rpm
Bore................................................ 71mm / 2.79"
Stroke............................................. 82mm / 3.23"
Displacement.................................... 649cc / 40 cu. in.
Compression Ratio............................ 8.5:1
Valve Clearance (cold):
Inlet................................................ 0.05mm / 0.002"
Exhaust............................................ 0.10mm / 0.004"
Valve Timing:
Inlet Valve Opens.............................. 34 degrees BTDC
Inlet Valve Closes.............................. 55 degrees BTDC
Exhaust Valve Opens.......................... 48 degrees BTDC
Exhaust Valve Closes.......................... 27 degrees BTDC

IGNITION:
Spark Plug Gap.................................. 0.50mm / 0.020"
Timing (fully advanced):
Crankshaft position............................. 38 degrees BTDC
Piston position................................... 11mm / 7/16" BTDC

CARBURETOR:
Type................................................ Amal Monobloc

TRANSMISSION:
Speeds.............................................. 4
Gear Ratios:
4th - Top........................................... 4.6
3rd - Third......................................... 5.5
2nd - Second....................................... 7.8
1st - Bottom...................................... 11.2
RPM @ 10MHP in Top Gear................... 638 RPM

CLUTCH:
Type................................................ Multi-plate, wet
Number of Plates:
Drive Plates...................................... 6
Driven Plates.................................... 5
Friction Material................................ Neolangite

SPROCKETS:
Engine............................................. 21 teeth
Clutch............................................. 43 teeth
Gearbox.......................................... 18 teeth
Rear Wheel...................................... 43 teeth

CHAIN:
Primary, pitch.................................. 1/2" X .335" X 5/16"
Primary, length................................. 70 links
Final Drive, pitch............................... 5/8" X .400" X 3/8"
Final Drive, length............................. 101 links

CAPACITIES:
Fuel (US versions)............................. 3 Imp. gal.
Fuel (UK & export versions)................. 4 Imp. gal.
Oil Tank........................................... 5 pints / 3 L
Gearbox........................................... 2/3 pt / 400cc
Primary Chaincase............................. 1/4 pt / 150cc
Front Forks....................................... 1/4 pt / 150cc

TIRES:
Front............................................... 3.25 X 19"
Rear................................................ 4.00 X 18"

SUSPENSION:
Front............................................... Telescopic Forks
Rear................................................ Swing arm

BRAKES:
Front............................................... 8" / 20.32cm SLS
Rear................................................ 7" / 17.78cm SLS

DIMENSIONS:
Seat Height...................................... 30.5" / 77.5cm
Wheelbase........................................ 55.25" / 140.3cm
Length.............................................. 86.25" / 219cm
Width............................................... 28.5" / 72cm
Ground Clearance.............................. 5" / 12.7cm
Dry Weight, unladen............................ 380 lbs / 173kg


TRIUMPH MOTORCYCLE BOOKS


TRIUMPH BONNEVILLE YEAR-BY-YEAR

TRIUMPH BONNEVILLE ESSENTIAL BUYER’S GUIDE

COMPLETE BOOK OF CLASSIC & MODERN TRIUMPHS

TRIUMPH MOTORCYCLES 1956-1983

FACTORY-ORIGINAL TRIUMPH TWINS

TRIUMPH MOTORCYCLES

TRIUMPH MOTORCYCLE RESTORATION, PRE-UNIT

TALES OF TRIUMPHS & THE MERIDEN FACTORY

TRIUMPH ILLUSTRATED SHOP MANUAL, 1935-1939

TRIUMPH ILLUSTRATED SHOP MANUAL, 1937-1951

TRIUMPH ILLUSTRATED SHOP MANUAL, 1945-1955


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