Debut of Bonneville T120 at Earls Court Bike Show
First Bonneville 650cc T120 released. Headlamp is enclosed in a nacelle and frame is single downtube
New model appears with twin downtube duplex frame and headlamp nacelle is absent
Amal monoblocs replace remote float bowl set-up
Land speed record achieved @ 224.57mph
Unit construction of engine and gearbox. Frame is revised with single downtube and duplex cradle
Approximately 70 Thruxton Bonnies built over next 2 years
Amal Concentric carburettors are introduced
Oil in frame Bonnevilles appear and indicators are standard
Optional five speed gear box is introduced
Five speed 750cc T140 released. Front disc brake is added and frame revised.        
NVT announces closure of Meriden.
Meriden Co-operative agreed to and trading begins under new name of Meriden Motor Cycle Co-operative.
First of the new Meriden Co-op Bonnevilles appear
Left side gear change is now standard as is rear disc
Purchase of Triumph name and sales rights from NVT. Limited edition Silver Jubilee released
New model sees electronic ignition, MkII Amals, revised instrumentation and parallel inlet ports
Electric start available
Last of Meriden built Bonnevilles. Increasing debts force Meridens closure
Bonnevilles now built under licence by parts manufacturer LF Harris in Devon
Production of Bonnevilles cease
1958
1959
1960
1961
1962
1963
1964
1967
1971
1972
1973

1975

1976
1977
1979
1980
1983
1985
1988
Meriden Bonneville Time-Line
Home - Back to T140.com main page
My Bike - 1979 T140e
Serial numbers and how to read them
Some invaluable links for all Bonneville enthusiasts