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Motorcycle engine valves
M72 750

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2025-02-09, 12:09

poland

Ulrich

Intake and exhaust valve set Duells K-750 M72 9.00 MM

The valves make a good impression. I use them in an M72. The dimensions correspond to the original parts, except for the stem diameter, which is 9mm and a touch more. Not quite half a mark on the micrometer. Very good when used in running cylinders. If the valves are to be fitted new in the factory, the guides may need to be reamed a little. Not a problem in my case, as K-Line guides are fitted in the cylinders anyway and these have to be reamed to size in any case. I particularly like the constriction just before the valve plate. This prevents carbon deposits from jamming the valve. With the original valves, I otherwise drilled out the guides at the bottom.

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  • Esthetics: star star star star star
  • Material quality: star star star star star
  • Fitting: star star star star star
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