If you look in the reflection of the Broughs tank you will see my V Twin. My father also rode this one when he was in his 70's. When I first bought it (a Ducati 888SP4) it had a speedo in kilometers and I rode it round to show Dad my new bike and he wanted a ride and I told him it had a K calibrated speedo, but it started pouring with rain so it was a few days later before he had a go and by then I had put an MPH speedo on it. I forget to mention this as he was off on it as soon as I arrived. When he came back I was surprised to here from him that whilst it was quick - "it took longer than expected to reach a ton". A short chat and the mystery was solved. He had taken it to an indicated 160 still thinking that it was a kilometers speedo and 160kph would be 100mph. So my 70+ year old father had just done 160mph on the Alton bypass! Mum was not amused, though dad clearly was and had a cigar and a beer to celebrate... My dad carried on riding bikes until he was 87 and then decided he was getting a bit old for bikes and bought himself a sports car.