Flashback. 1979 Triumph T140 Bonneville

1979TriumphT140BonnevillePromo05152016The Triumph Bonneville T140 is a 750 cc (46 cu in) capacity 360-degree, air cooled parallel twin engine motorcycle produced from 1973 until 1983 when the company declared bankruptcy. Twin Amal carburetors supply the cylinders through short intake manifolds. The 19 inch diameter front wheel and 18 inch rear wheel were spoked with optional cast alloy wheels available from 1979 onwards. The under-seat area is occupied by the battery and ignition coils.

In 1975, in addition to some engine improvements shifting lever was moved from right to left to comply with new regulations mandated for the American market and a rear disc brake was fitted. From 1976, the T140 had hydraulic disc brakes for both the front and rear wheels. By the way, The Bonneville model name came from the achievements of racer Johnny Allen on the Bonneville Salt Flats in Utah in the 1950s. (Photo @ Doug Mitchel)

4 Responses to “Flashback. 1979 Triumph T140 Bonneville”


  1. 1 Hillbilly Jim May 20th, 2016 at 12:56 pm

    My Son has one of these disc brake 750 5 speed Bonnievilles in the garage. Still a good performing motorcycle with above average looks. One has to wonder why they went belly up.

  2. 2 nicker May 20th, 2016 at 5:01 pm

    Parallel twins were simply not competitive in the HP wars of that era.
    Great balance & handling didn’t mean much to potential customers who could only ride in a straight line.

    Got one in the garage that took me to work every day for many, many years.
    Could tear up the back roads on weekends with the best of em.
    And took me camping all over Nor-CA and southern Oregon on vacations.

    No better scooter to cow-trail down to any creek you saw along the way for some quick fishing…. 🙂

    -nicker-

  3. 3 Don R May 20th, 2016 at 5:17 pm

    In 1977 I bought a brand new blue and white 750 Bonneville. This was back when a 3-4 garage was a dealership. I went into storage area and the owner lifted the top off crate bike came in so I could see. No big fancy ass showroom then. At the time I paid $1950 for the bike. Think I should have kept it? Ride safe. Don, St Petersburg, FL

  4. 4 R Alan May 24th, 2016 at 6:34 am

    I had 4 or 5 Bonnevilles. Last on being a ’79. I was in my mid 20’s and remember doing doughnuts with it in the gravel. Had Japanese carbs if I remember correctly. Still flooded easily…

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Cyril Huze