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I saw this bike at the Thoresby show today. I wonder if the 2.3 inline 3 would fit in a Vitesse/Herald.
Engine is a Liquid-cooled, DOHC, in-line 3-cylinder with a Capacity of 2,294cc
According the manufacturer website it has Maximum Power of 106bhp @ 5,400 rpm and Maximum Torque of 154ft.lbf @ 2,025 rpm
Not a lot of progress in 40 years then. So it turns out not have any more power than the Vitesse. Why bother.