Ah, the 998. Can't have been so many imp owners with that engine, it was standard fit on the Stiletto (it was called the "998 rally" if I remember – had a fairly wild cam, much bigger valves and twin 125 CD Strombergs adding up to an engine that was good for 7000 rpm if you were a gambler).
I didn't know they had a pneumatic throttle on some of them. Mine all had a cable as normal with the choke under the hand brake lever (I think the Stiletto had a choke on the dash but it was a long time ago).
I recall the Stiletto had reclining seats which was a feature of envy for my mates at that age (17+ years of age)….
Mark