1963 Harley Davidson Aermacchi Ala D’Oro Pictures
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In 1960 Harley-Davidson purchased the Italy’s Aeronautica Macchi Co., increased the displacement of the domestic 175cc model to 250cc and used a production racing version of it to contest the World Championship. Engine Air-Cooled 4-st. Single OHV Displacement 246.32cc Max Power over 26PS / 9,000rpm Dry Weight 100kg Transmission 4-Speed Picture taken by Martin Stone in the Honda Collection Hall at Motegi
Up to & including 1962 production racers were 4 speed, from 1963 on they had 5 gears
Could be very fragile, i.e con-rods breaking, cured later with a different design / maker.
wire would pull out of condenser, it was a little too short & therefore tight & with a little vibration, that was it – stop.
I know because I suffered a good number of breakdowns in both 62 & 63, sometimes when leading a race