What do you make of the barrel? I'm not at all familiar with the Monty/Bandido/TSS engines but I've read that the cylinder was based on the motocross engines of the time. The wide spaced finning looks like a Pursang, but then they didn't have the central exhaust. Maybe a Pursang with a modified exhaust passage? As far as I know the TSS's all used the closely spaced fins.
I found this and translated it using google... it is a 24h cylinder.
“Thank you all very much !! ......., for your interest and comments, I can assure you that this project has been without any doubt pure masochism !!! ..........: oki:
When Rafa began to think about this project, none of us were aware of where we were going, because as it was popularly said, it is a tuned racing Monjuitc !!, for everyone who thinks that ........ tarari , tarari, nothing further from reality.
You can not imagine the hours of research looking at the four photos we had, looking at them and turning them around trying to see things that are not seen, trying to imagine them to complete the puzzle, throwing pieces made ......., to later realize they were otherwise crazy!
We had the only starting point with an original deposit that Rafa got in his day, and I still kept the colt with which I made the chassis for the replica of the Montjuic 360, winner of the 24 hours of 1969, so we started for manufacturing a chassis, but we did not imagine the number of parts we have had to manufacture from scratch, with a thousand and one difficulties.
There are a thousand and one anecdotes to tell, as a curiosity I tell you some, original cylinder 24H from 1972, but the stock was missing, from a broken into six or seven pieces supplied by the great collector of Bultaco, Vicente Ballester (Tralla), knob glued to melt a new one. For the underside of the engine we started with a Montadero engine, to which everything necessary was transformed including a TSS 5-speed closed ratio gearbox (purchased from Rectificados Bellavista), logically the TTS does not have it, then it had to be manufactured the starter pinion. Anyway long, very long to count ......
Once again this Dinosaur has come back to life, thanks to the efforts (without limit) of the Lozano Brothers to recover the motorcycle history.
As for Manolo and a server, you can imagine, proud to be able to collaborate in such a magnificent project.
Here Manolo and I celebrating the final assembly of such an ambitious project.”
https://www.amoticos.org/t14442-bultaco-montjuic-360-1974
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