Montesa's team participated in the Isle of Man TT on three occasions, in 1951, 1954 and 1956. This unit was present in the 1956 expedition, with F.X. Bultó and L. Milá, it has been maintained since then by the Basque rider José Ramón Eizaguirre. It has a cylinder head with parabolic combustion chamber, extra lubrication by sprayer in the carburettor and an estimated power of 17 bhp at 8,000 rpm.
Photographed at the Museu Moto Bassella Montesa Exhibition of 2021 by Mike Ricketts.