1967 Triumph TR6

1967 TRIUMPH TR6 BY THE NUMBERS
The 1967 model year included four Triumph TR6 Trophy models: TR6, TR6R, TR6C & TR6P. Engine & frame numbers ran from DU46201 to DU66246, built from September 14, 1966 to July 3, 1967.

ENGINE MODS
Hepworth & Grandage pistons replaced the Triumph units, while the 9.0:1 compression ratio remained unchanged. Starting with engine #DU63043 the final exhaust cam oiling scheme was introduced. Called "timed tappets", oil was fed to the exhaust tappet block at full & constant pressure, & the exhaust cam pushed the tappets up, they opened small oil ports that provided oiling to the exhaust cam lobes. Starting with engine #DU63241 an O-ring was installed on the tappet blocks to prevent oil seepage between the tappet blocks & the barrels. The oil pump was increased in scavenge capacity.

NEW CONCENTRIC CARB
Gone was the age-old Amal Monobloc carburetor. Starting with engine #DU63043 the 1967 Triumph TR6 got a new Amal Concentric (#R930/9-B) with a 30mm bore.
GEARBOX CHANGES
A new mainshaft with longer threads allowed the use of a self-locking nut. Alternate engagement dogs on the mainshaft second gear were deleted to ease shifting.

FRAME & CYCLE GEAR
The anti-theft steering lock was moved from the middle of the steering head to the bottom, now threaded for adjustment. All threads on the frames were now converted to UNF. A new fork top lug went along with the new lock set up. Front fork gaiters now got spring clips to secure them. From Engine #DU54659, O-rings were added to the fork seal holders to help prevent seepage.

BODY WORK
The parcel rack was eliminated from US models, & so the US-market tanks lost the threaded mounting lugs. From #DU54659, the oil tank reverted back to the old top-end oiling set up from 1965.

1967 Triumph TR6 SPECIFICATIONS


Model Designations:

TR6S/S

TR6C

TR6SC

TR6R

TR6SR

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 sprockets

Frame type

Suspension, front

Suspension, rear

Brake, front

Brake, rear

Tire, front

Tire, rear

Fuel Capacity

Wheelbase

Seat height

Ground clearance

Dry Weight


Street scrambler

Off-road/street (dual purpose/enduro)

Off-road, competition

Roadster

High-performance roadster

Air-cooled OHV vertical twin

649cc / 40.0 ci

71mm X 82mm / 2.79" X 3.23"

8.5:1

1- Amal Concentric, 30mm

Battery & coil, Lucas

42 bhp @ 6500 rpm

3/8" triplex chain X 84 links

Engine 29T X Clutch 58T

Multi-plate, wet

4-speed constant-mesh, right-foot shift


11.8:1

8.17:1

6.76:1

5.84:1

5/8" X .400" X 3/8" chain X 106 links

Gearbox 19T X Rear 47T

Brazed lug, full-cradle, single downtube

Telescopic fork, hydraulic damping

Swing arm, 2 Girling dampers

8" SLS drum, full-width

7" SLS drum, one-side

3.25" X 19" Dunlop

4.00" X 18" Dunlop

2.5 Imp gal (US)/4 Imp gal (UK & export)

54.5" / 140.3 cm

32.5" / 77.5 cm

5.0" / 12.7 cm

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


Check out these TRIUMPH 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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