1957 Triumph TR6

NEW LOOK
The 1957 Triumph TR6 debuted with a new tank badge that was prominent across the entire 1957 Triumph lineup. Called "The Mouth Organ" it was as striking chromed grille set between two horizontal chrome 'eyebrows'. It really paid homage to the new flamboyant era of the late 1950's & catered particularly, to the burgeoning American market. This and a chrome horizontal trim strip along the side of the tank allowed two-tone paint jobs, and Triumph was one of the few manufacturers in their day to really get it right. For the most part, the 2-tone Triumph Motorcycles from this era looked great!
ENGINE UPGRADES
Both the T110 (Triumph Tiger) and the 1957 Triumph TR6 engines benefited from numerous improvements. Oil drainage from the rocker boxes down through the pushrod tubes was improved. The compression ratio on UK market models dropped from 8.5:1 to 8:1. Rev counters (tachometers) became available optionally, driven off of a modified timing cover.

CHASSIS IMPROVEMENTS
The 1957 Triumph TR6 got a steeper steering head angle, compared to all other Triumphs, in response to American requests for better off-road handling. It also got the 6T-type 'hole-in-the-frame' in the seat post behind the single carburetor, which the air cleaner hose passes through, to allow the use of a larger air cleaner.

WHEEL & SUSPENSION MODS
The biggest improvement was certainly the move from a 7-inch front brake to an 8-inch SLS (single leading shoe) unit. The brake anchor plates on the forks were now induction welded, as were the fender (mudguard) stays. Wheel spokes became straight & butted, and the rears larger in diameter. From Engine# 08563, rear shocks (units) were changed to 100lb units with 3 inches of travel, in an effort to curb rear end weave (actually later found to be due to weak support of the swing arm pivot points).

A GOOD OMEN OF THINGS TO COME
1957 was an interesting year for Triumph Motorcycles, in more ways than new tank emblems. The 350cc 3TA twin line had just gone Unit Construction, the first Triumph to do so. The 500 twins would soon follow. 1957 also seemed to be about the time when tastes were changing away from the T100 (500cc) Tigers and moving toward the 650s. But, in 1957 it was the T100 that got the first twin-carb head, that was made out of a modified 650 Delta Head, as the 500 & 650 top ends were basically interchangeable during the pre-unit era. This new twin carb T100 factory racer had larger intake valves, E3134 cams and "R-grind" followers, racing valve springs, bronze valve guides, 9:1 compression, and splayed intake ports, allowing the use of Amal Monobloc carbs. It all worked well together, taking the T100 to 105mph. News spread quickly & demand for a twin-carb 650 became overwhelming. It would be 2 more years before Triumph would answer with the Bonneville.

1957 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

MORE TRIUMPH:
Triumph T120 & T140 Bonneville
Triumph TR6
Triumph TR7
Triumph T110 & T110 Tiger
Triumph 6T Thunderbird
Triumph 5T Speed Twin
Triumph T150 & T160 Trident
Triumph X-75 Hurricane

Check out these TRIUMPH BOOKS




2018 Classic Triumph Calendar


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
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 - 1957 Triumph TR6
Last updated 11/30/17

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


BREAKING NEWS:

The New BSAs?
Insider tells all



Las Vegas Auction Week
Almost 2,000 bikes!



NEW PAGE:
Vintage Motorcycle Pictures



2018 CALENDARS ARE HERE!



Visit our new
Motorcycle Store

WHITWORTH WRENCH & SOCKET SET





Please visit our
MOTORCYCLE BOOK STORE


Subscribe to your favorite
MOTORCYCLE MAGAZINES





BIKES FOR SALE!
Check out our
FREE
Classifed Ads



NEW SECTIONS:

AJS Motorcycles

NEW PAGES
added this month:

* Helmet Features 2018
* AJS Motorcycles
* 1961 AJS Model 31
* 1959 AJS Model 16
* 1927 AJS Model H4
* 1959 AJS Model 31 CSR
* 1946 AJS Model 18
* 1964 AJS Model 16
* 1953 AJS Model 18
* 1950 AJS 7R Boy Racer
* 1933 BSA B33
* John's British Cycles
* 1961 Matchless G80 Typhoon
* 1958 BSA Gold Star
* Ariel Twins
* 1959 Ariel Huntmaster
* 1964 Triumph Thunderbird
* 1961 Triumph Cub
* 1959 Velocette Venom
* 1956 Triumph TR5R
* 1955 Vincent Black Prince
* 1951 Triumph Speed Twin
* 1958 Ariel Huntmaster
* 1954 Triumph T15 Terrier
* Military Motorcycles
* 1941 Harley-Davidson WLA
* 1942 Harley-Davidson WLA
* 1999 Harley-Davidson MT500
Enjoy. More coming soon...