Triumph Bonneville

The Triumph Bonneville is a standard motorcycle featuring a parallel-twin four-stroke engine and manufactured in three generations over three separate production runs.

Design

  • The sweeping curve in the top of the fuel tank
  • Authentic twin rear shocks
  • long reversed cone silencers
  • the chromed headlight bowl
  • yoke mounted instrument pod.

ENGINE
The iconic, air-cooled parallel twin sits proudly at the heart of the Bonneville. Setting the style for the entire bike. The engine and transmission has been engineered with the look of the classic Triumph twins in mind. Even the fuel injection has been moulded so you get the appearance of a pair of carburettors and there are double overhead camshafts despite what looks like a pushrod tube at the front of the engine, just like Bonnevilles used to have.

WHEELS
Cast aluminium, just like the ones used on Bonnevilles in the 1970s.

Triumph_Streetwin_profile

PERFORMANCE
From day one Bonnevilles have been built to be ridden, not just to look good. Today, this 865cc parallel twin puts out a healthy 61PS with 61Nm of torque at its peak, with plenty available at low revs so you get most use out of it. The fuelling is controlled by a sophisticated management computer programmed for clean emissions and a smooth, predictable throttle response. So there’s enough performance to be fun for experienced riders but not so much that will intimidate riders with fewer miles behind them.

CONFIGURATION
A pair of cylinders still stand upright and proud at the heart of the Bonneville. With a wide bore and short stroke that adds up to 865cc for high levels of efficiency and low wear, with four valves per cylinder for the best breathing and power. There are balance shafts tucked away inside the crankcase so you’ll notice very little vibration for a parallel twin and, being air cooled, there’s no radiator to spoil the view.

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