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Looks like a vintage Triumph judging from the timing cover and head shape. Although the upper fins do continue behind the the plug unlike the vintage Triumph. The timing cover is on the wrong side too along with the other issues. The vintage Triumph had a 360º crank.






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I thought the pistons went up and down together, but what do I know.




Methinks what's being shown is a 270 degree firing system.




Not likely with that kicker being on there (even though it is on the wrong side).




Did I say it was our engine?
Or even an engine that has ever existed?

As Ian points out, it looks Triumph apart from one or two differences, but the only thing that actually says "Triumph" is the title of the clip.

It is still a 270 degree crank no matter who made it


Too old to die young, too ugly to leave a good looking corpse