Innocenti's eagerness to prove to the world that the Lambretta engine was the most economical and the fastest in the world, for its cc's, lead them to build many one offs and works racers. Ranging from a 200kph world record holder to scooters built specifically for certain events saw Lambretta gain promotion for its range of scooters.

This the Racing Model A with a slightly larger bore and a few tuning modifications is capable of almost 70mph. It was built in 1948 and has many Model B components.

Following on from the Model A racer, Innocenti produced a 'B' racer. Porting and tuning modifications, included a larger inlet manifold and carb, a high compression finned cylinder head. Abrath sports exhaust, quick action throttle, larger capacity fuel tank, dampened suspension, quick release spare wheel, trimmed leg shields and cut down front mudguard were just some of the modifications carried out on the racing B.

Very similar to the competition 'C'. They appear to be modelled on the later 'D's because of the cable operated rear brake, rear suspension damper and 150cc engine. The thought is that these machines were a very limited production, and offered by the Innocenti factory to dealers who managed to sell the greatest volume of scooters for them. The pillion seat was standard, and the only colour they were available in was red.

The Rallymaster was designed by Alan Kimber and built at Lambretta Concessionaires for the UK market. It was a very striking machine, with distinctive black and red stripes painted across the side panels. The machine also featured a turning front mudguard, possibly borrowed from the Spanish produced machines as this was one of their features. The horn casting was also different which aligned with the mudguard. The Rallymaster for built specifically for the UK sporting enthusiasts, it was fitted with many extras including a 4.00 x 10 rear wheel, ball-end levers, Perspex sports screen, tally number plates and a GB plate. There was also a handle on the rear for scrambling work, enabling the machine to be lifted out of trouble. A special 'instrument panel' housed a rev counter, stop watch holder, illuminated map board and a separate switch for the extra spotlight, which came as standard. The engine based based on the standard 150cc unit, but was staged two tuned, given a larger bore carburettor, high performance exhaust, and a closer ratio gearbox. Production figures are not known, although only a handful of genuine Concessionaires built machines exist today.