Originally Posted by Tanshanomi
The first prototype Montijuich engine was basically a de-tuned version of the air-cooled 360 TSS roadracer that won the 24 Horas de Montjuic (which was the source of the name). And yes, that engine used the same basic gear-primary architecture as the production gear-drive 360s. But later on they went to a totally new, experimental 400cc motor (shown below) that, sad to say, never saw the light of day.
Since the Montjuic never actually went into production, it's sort of a moot question.
But a neat bike nonetheless,Id love to have a street going Bultaco of some sort.