1956 Triumph TR6

ABOVE: 1956 Triumph TR6 Trophy w/2-into-1 "siamesed" high exhaust running along the left side.

TR6 BY THE NUMBERS
1956 Engine/Frame numbers: 70199 to 82797
Production Dates: August 8, 1955 to July 27, 1956

1956 TRIUMPH TR6 - THE NEW KID IN TOWN
Triumph Motorcycles were on a roll in the 1950's, with one hit after another. Of course the Triumph Speed Twin started the ball rolling, soon followed up by the hotrod version, the Tiger T100. Before long even this wasn't enough and the venerable Mr. Edward Turner saw fit to enlarge his 500 twin to a 650 with the 1950 Triumph 6T Thunderbird. This too was soon eclipsed by a hotrod version, the Tiger T110.

NEW DELTA HEAD
This brings us to 1956 and the introduction by Triumph of an all new alloy cylinder head, dubbed the "Delta Head" because of its distinctive shape. The totally-redesigned head solved the overheating problems of the cast iron heads being used up to that point, and eliminated the external oil pipes by routing returning oil down through the pushrod tubes instead.

A NEW DUAL-PURPOSE BIKE
With the new cylinder head came an all new motorcycle, indeed an all new type of motorcycle, the 1956 Triumph TR6 Trophy. It was a dual-purpose bike, street legal but offroad-capable with knobby tires, minimal fenders (mudguards) & high pipes. The TR6 was clearly intended for the wide open spaces of America and the burgeoning off-road & desert racing market in the US (although it was also available in the UK and other export markets).
HOT ROD
The 1956 Triumph TR6 shared much with its siblings, the 6T Triumph Thunderbird and the Triumph Tiger T110. The frame and running gear (cycle gear) carried over with the obvious exceptions of the headlight, fenders and pipes. The basic 650cc Tiger T110 engine was used, fitted with the new Delta Head, along with E3325 high-performance cams and an 8.5:1 compression ratio (later dropped to 8:1 in the interest of durability). Was it fast? One of the fastest motorcycles you could buy in 1956. It was the stuff of legend. Remember, the iconic Triumph Bonneville wasn't due out for another 3 years.
A DIRT BIKE IN STREET CLOTHES
One interesting feature came with the elimination of the Tiger and T-Bird twins' clunky headlight nacelle. The 1956 Triumph TR6 came with a sleek, tidy removable headlight with detachable wiring & even a detachable dynamo. The 1956 Triumph TR6 shared much with its smaller brother, the 500cc TR5. These included the primary chaincase, detachable dyno, oil tank, and slim dual seat. The 3-gallon fuel tank and siamesed 2-into-1 side exhaust running high along the left side (two side pipes, one on each side, became available late in the model year) completed the off-road package. Was it effective as a dirt bike? Well, at the prestigious 1957 Big Bear Run Enduro in California, TR6 Trophies took no less than the first 12 places overall!! The TR6 legend was off & running.


1956 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

7" 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


Check out these TRIUMPH BOOKS




Triumph Motorcycles: The art of the motorcycle


The Complete Book of Classic and Modern Triumph Motorcycles 1937-Today (Complete Book Series)


Triumph Motorcycles: From Speed-Twin to Bonneville


Triumph Bonneville and TR6 Motorcycle Restoration Guide: 1956-83


British Motorcycles Triumph (Little Books)


Triumph Motorcycles in America


McQueen's Motorcycles: Racing and Riding with the King of Cool


Triumph Motorcycle Restoration


Illustrated Triumph Motorcycles Buyer's Guide: From 1945 Through the Latest Models (Illustrated Buyer's Guide)


Tales of Triumph Motorcycles and the Meriden Factory


Hinckley Triumphs: The First Generation (Crowood Motoclassic)

For more like these, visit our
TRIUMPH BOOK STORE









Please visit our
MOTORCYCLE BOOK STORE


Take a tour of our site...

HOME PAGE
Triumph Motorcycles
.....Bonneville
.....Tiger
.....Trophy
.....TR6
.....TR7
.....Trident
.....X-75 Hurricane
.....6T Thunderbird
.....5T Speed Twin
.....Daytona
.....Twenty-One
.....3T 350 Twins
BSA Motorcycles
.....A65
.....A10
.....A7
.....Gold Star
.....Bantam
.....Rocket 3
.....B50
Norton Motorcycles
.....Commando
.....Atlas
.....Dominator
.....Model 7
.....Manx
.....Navigator
AMC-Associated Motor Cycles
Matchless-AJS Motorcycles
.....G3
.....G9
.....G12
.....G80
Royal Enfield Motorcycles
.....Interceptor
.....Bullet
Ariel Motorcycles
.....Square Four
.....Red Hunter
.....Cyclone
Vincent Motorcycles
.....Black Shadow
.....Rapide
.....Comet
.....Egli-Vincent
Velocette Motorcycles
.....KSS
.....KTT
.....LE
.....MAC
.....Thruxton
.....Venom
.....LE
Rickman Motorcycles
Japanese Motorcycles
.....Honda
.....Kawasaki
.....Suzuki
.....Yamaha
Cafe Racers
....Triumph Cafe Racers
.....Norton Cafe Racers
.....Other Cafe Racers
Choppers & Bobbers
.....Choppers
.....Triumph Choppers
.....BSA Choppers
.....Rat Bikes
Classic Racing Motorcycles

Classic Motorcycle Events
.....Auctions
.....Shows
.....Rides
Classic Motorcycle Restoration
Classic Motorcycle Shops
Classic Motorcycle Clubs
Classic Motorcycle Photo Gallery
Send us Pictures of YOUR BIKE
YOUR BIKE Pictures

HOME PAGE
.....About Us
.....Site Map
.....CONTACT US
.....Please visit our BLOG
.....Subscribe to our FREE e-zine BRIT IRON
.....BRIT IRON E-zine Back Issues

Visit our STORES
.....Motorcycle Books
.....Motorcycle Magazines
.....Motorcycle Calendars
.....Motorcycle Accessories
..........Motorcycle Helmets
..........Motorcycle Rain Suits
..........Motorcycle Locks & Security
..........Motorcycle T-Shirts
..........Motorcycle Diecast Models
..........GoPro Cameras
.....Motorcycle Parts
..........Motorcycle Tires
..........Motorcycle Chains
..........Motorcycle Batteries
..........Motorcycle Handlebars
.....Motorcycle Tools
..........Whitworth Tools
..........Tire Tools
..........Chain Tools

Crazy about cars, too? Check out our sister site:
www.American-Muscle-Cars.net

Back to top - 1956 Triumph TR6
Last updated 11/30/17

Learn how to BUILD YOUR OWN WEBSITE, like I did.