1969 Triumph TR6

1969 TRIUMPH TR6 BY THE NUMBERS
For the first time ever, a Triumph TR6 was called a "Tiger". In fact the entire 1969 Triumph TR6 model lineup were all Triumph Tigers & would remain so for the rest of its life. Interestingly however, Triumph workers at the Meriden factory continued to refer to the TR6 as a Trophy for many years. The individual 1969 Triumph Tiger models were the standard TR6, TR6R roadster, TR6C street scrambler with high pipes & the TR6P for Police work. Engine & Frame Numbers ran from DU87124 to DU88524, built from July 29, 1968 to August 14, 1968; then NC02352 to HC2434, built from October 26, 1968 to July 15, 1969. This first batch was the last to use the "DU" engine number prefix, in use since 1963. Henceforth, engine numbers would be preceded by a 2- or 3-letter prefix indicating the month & year of manufacture.

ENGINE CHANGES
Along with the entire motorcycle, all threads in the engines were now converted from British Standard to "American" (UNC & UNF) threads. New connecting rods, dimensionally unchanged, now with UNF bolts & nuts, too 28 lb/ft of torque instead of 22. Hepolite pistons were made shorter, thicker at the crown & gudgeon pin (wrist pin). The oil pump feed plunger was enlarged to increase oil volume. Crankshaft flywheel weight was increased but the balance factor remained at 85%. Pushrod tubes were revised again, this time with Viton O-rings top & bottom in the never-ending quest for oil-tightness. To this end, the primary & gearbox filler caps were given O-rings as well. The alternator cable was repositioned to exit the top of the primary case. To improve long term durability, both cams were now nitrided, ending the premature wear problems once & for all.

1969 TRIUMPH TR6 BY THE NUMBERS
For the first time ever, a Triumph TR6 was called a "Tiger". In fact the entire 1969 Triumph TR6 model lineup were all Triumph Tigers & would remain so for the rest of its life. Interestingly however, Triumph workers at the Meriden factory continued to refer to the TR6 as a Trophy for many years. The individual 1969 Triumph Tiger models were the standard TR6, TR6R roadster, TR6C street scrambler with high pipes & the TR6P for Police work. Engine & Frame Numbers ran from DU87124 to DU88524, built from July 29, 1968 to August 14, 1968; then NC02352 to HC2434, built from October 26, 1968 to July 15, 1969. This first batch was the last to use the "DU" engine number prefix, in use since 1963. Henceforth, engine numbers would be preceded by a 2- or 3-letter prefix indicating the month & year of manufacture.

ENGINE CHANGES
Along with the entire motorcycle, all threads in the engines were now converted from British Standard to "American" (UNC & UNF) threads. New connecting rods, dimensionally unchanged, now with UNF bolts & nuts, too 28 lb/ft of torque instead of 22. Hepolite pistons were made shorter, thicker at the crown & gudgeon pin (wrist pin). The oil pump feed plunger was enlarged to increase oil volume. Crankshaft flywheel weight was increased but the balance factor remained at 85%. Pushrod tubes were revised again, this time with Viton O-rings top & bottom in the never-ending quest for oil-tightness. To this end, the primary & gearbox filler caps were given O-rings as well. The alternator cable was repositioned to exit the top of the primary case. To improve long term durability, both cams were now nitrided, ending the premature wear problems once & for all.

ABOVE: This 1969 Triumph TR6 Tiger is a TR6C model with high pipes. Note the chromed-wire heat shield. Most were removed & lost years ago.

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1969 Triumph TR6 SPECIFICATIONS

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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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Check out these TRIUMPH BOOKS

COMPLETE BOOK OF CLASSIC & MODERN TRIUMPHS

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TRIUMPH MOTORCYCLES IN AMERICA

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TRIUMPH MOTORCYCLE RESTORATION

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TRIUMPH MOTORCYCLE RESTORATION, PRE-UNIT

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TRIUMPH BONNEVILLE & TR6 RESTORATION GUIDE: 1956-1983

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TALES OF TRIUMPH MOTORCYCLES & THE MERIDEN FACTORY

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TRIUMPH 650 & 750 TWINS OWNERS WORKSHOP MANUAL, 1963-1983

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TRIUMPH BONNEVILLE: ESSENTIAL BUYER’S GUIDE

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TRIUMPH BONNEVILLE: PORTRAIT OF A LEGEND

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ILLUSTRATED TRIUMPH BUYER’S GUIDE, by Roy Bacon

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TRIUMPH BONNEVILLE, 2001-2015

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TRIUMPH: PRODUCTION TESTERS TALES FROM MERIDEN

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TRIUMPH MOTORCYCLE RESTORATION GUIDE

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TRIUMPH OWNERS HANDBOOK, UNIT-CONSTRUCTION 350 & 500, Kindle

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TRIUMPH ILLUSTRATED WORKSHOP MANUAL 1945-1955, by Clymer

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TRIUMPH TWINS & TRIPLES

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FACTORY-ORIGINAL TRIUMPH TWINS, 1938-1962

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TRIUMPH BONNEVILLE & TR6, by Timothy Remus

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TRIUMPH MOTORCYCLES: FROM SPEED TWIN TO BONNEVILLE

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TRIUMPH MOTORCYCLES: THEIR RENAISSANCE & THE HINKLEY FACTORY

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TRIUMPH PRE-UNIT TWINS OWNERS WORKSHOP MANUAL

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TRIUMPH THRUXTON BONNEVILLE 1959-1969

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TRIUMPH MOTORCYCLES ILLUSTRATED WORKSHOP MANUAL 1937-1951, by Clymer

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TURNER’S TRIUMPHS: EDWARD TURNER & HIS TRIUMPHS

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TRIUMPH TWIN RESTORATION, by Roy Bacon

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TRIUMPH TIGER CUB & TERRIER 1952-1968, Haynes Repair Manual

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TRIUMPH 675 DAYTONA & SPEED TRIPLE REPAIR MANUAL 2006-2010, Haynes

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CLASSIC MOTORCYCLES: TRIUMPH

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TRIUMPH BONNEVILLE YEAR BY YEAR

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TRIUMPH TRIPLES

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TRIUMPH RACING MOTORCYCLES IN AMERICA

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TRIUMPH MOTORCYCLES

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TRIUMPH, by Roy Bacon

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TRIUMPH 750/900 TRIPLES & 1200 FOURS 1991-1999, Haynes Repair Manual

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TRIUMPH TROPHY BIBLE

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TRIUMPH DAYTONA, SPEED TRIPLE SPRINT & TIGER: 885/955 1997-2005, Haynes Repair Manual

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BSA & TRIUMPH TRIPLES GOLD PORTFOLIO 1968-1976

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TRIUMPH TRIDENT OWNERS WORKSHOP MANUAL, by Haynes

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TRIUMPH: A CENTURY OF PASSION & POWER

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TRIUMPH BONNEVILLE, by Osprey

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TRIUMPH TIGER 100 & 110, 1939-1961, by Roy Bacon

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TRIUMPH TIGER 100 & DAYTONA

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TRIUMPH BONNEVILLE, by Crowood

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TRIUMPH by Don Morley

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TRIUMPH TRIPLES & FOURS 1991 & 2004

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TRIUMPH 350 & 500 1957-1974 ESSENTIAL BUYERS GUIDE

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BONNIE: THE DEVELOPMENT OF THE TRIUMPH BONNEVILLE

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TRIUMPH SINGLES: EARLY DAYS TO 1974, by Roy Bacon

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TRIUMPH: RETURN OF THE LEGEND

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TRIUMPH FUEL INJECTED TRIPLES 1997-2000

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BOOK OF TRIUMPH TWINS 1968-1969, by Floyd Clymer

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THE TRIUMPH STORY: RACING & PRODUCTION MODELS 1902-PRESENT

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TRIUMPH 350 & 500 TWINS 1958-1973, Haynes Repair Manual

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TRIUMPH BONNEVILLE 2001-=2008 ROAD TEST PORTFOLIO

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HINKLEY TRIPLES & FOURS

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TRIUMPH PRE-UNIT TWINS

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HINKLEY TRIUMPHS: THE FIRST GENERATION

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TRIUMPH BONNEVILLE BIBLE: ALL MODELS 1959-1983

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TRIUMPH TWENTY-ONE TO DAYTONA: C CLASS 350 & 500 TWINS

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ORIGINAL TRIUMPH BONNEVILLE

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TRIUMPH 650 & 750 TWINS

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TRIUMPH MOTORCYCLES & CUSTOM BIKES

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TRIUMPH MOTORCYCLES

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TRIUMPH, THE LEGENDS SERIES

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TRIUMPH THUNDERBIRD SUPER PROFILE

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TRIUMPH SPEED TWIN & THUNDERBIRD BIBLE

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TRIUMPH BONNEVILLE T120/T140

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TRIUMPH MOTORCYCLES FROM 1950-1983

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TRIUMPH & BSA TRIPLES: THE COMPLETE STORY

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TRIUMPH THUNDERBIRD, TROPHY & TIGER ESSENTIAL BUYERS GUIDE

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TRIUMPH TIGER CUB BIBLE

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ROAD RACING HISTORY OF THE TRIUMPH 500 UNIT TWIN

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EDWARD TURNER: THE MAN BEHIND THE MOTORCYCLES

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SAVE THE BONNEVILLE: THE INSIDE STORY OF THE MERIDEN WORKERS CO-OP

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TRIUMPH DAYTONA 1991-2006 ROAD TEST PORTFOLIO

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TRIUMPH DAYTONA 2003-2009 ROAD TEST PORTFOLIO

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TRIUMPH TIGER 100 / DAYTONA: DEVELOPMENT HISTORY

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TRIUMPH, by Daniel Gilpin

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BOOK OF TRIUMPH MOTORCYCLES ILLUSTRATED SHOP MANUAL 1935-1939

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TRIUMPH: THE RACING STORY

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TRIUMPH BONNEVILLE T120 1959-1974, by Roy Bacon

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TRIUMPH BONNEVILLE GOLD PORTFOLIO 1959-1983

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TRIUMPH TRIDENT SUPER PROFILE

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ILLUSTRATED TRIUMPH BUYERS GUIDE, by Roy Bacon

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Last updated 8/3/17

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