Triumph Thunderbird
What is your favourite motorcycle of all time?
Born out of demand from mainly their American customers, Triumph enlarged the Speed Twin in 1946 by 150cc and called it the Thunderbird. Both bore and stroke increased from 63 x 80mm to a nearer "Square" dimension of 71 x 82mm, giving 649cc and a power output of 34bhp @6300rpm. The 8hp advantage over the 500 produced a noticeable surge of mid-range torque and a road performance superior to the Tiger 100.
If you would like to find out more about the classic Triumph Thunderbird motorcycle art featured in this guide please click here.
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