QUOTE (Rennmax @ Jul 18 2009, 15:50)

The configuaration is correct ? There were 3 valve engines of course, IIRC the TTF1 winning Honda of Phil Read in '77 and even the roadgoing CB 400, but these bikes had 2 inlet, 1 outlet....

The 7R was the other way around, two inlet, one exhaust. The tripple cam motor was based on a 7R bottom end that underwent various mods, with the final version replacing the camshaft drive train with a vertical shaft and bevel gears.
It wasnt a great succsess, although Rod Coleman did win the Junior TT in '54 with it. Accordong to the blurb on it, it poked out 40 bhp....about 3-4 bhp more than 7R's of that period?
Otherwise known as one inlet, two exhaust .....