It was a 750cc air-cooled unit construction (engine and gearbox components sharing a single casing), pushrod triple with four gears with conventional chassis and suspension design. This one, however, has quite a different history.
1972 JPS LOTUS 72D, TYRELL 003 BRANDS HATCH F1 cover signed REINE WISELL
Speedway Star And News, 5th February 1972 Cover Picture Cyril Maidment
Speedway Star And News, 12th February 1972 Cover Norman Hunter Geoff Ambrose
Speedway Star And News, 22nd January 1972 Cover Picture Anders Michanek
Speedway Star And News, 15th January 1972 Cover Picture Tony Clarke Bert Harkins
Speedway Star And News, 26th February 1972 Cover Picture Bobby Campbell