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M72 750
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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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The shaft makes a very good visual impression. The connecting rods are copper-plated, as is otherwise only known from the legendary Hoeckle shafts. The connecting rod bearings are absolutely free of play, the concentricity has a deviation of less than one hundredth, which can be seen as a measurement tolerance, and the offset when measuring the rollover is also barely measurable. The bearing seats at the front and rear are 1-2 hundredths below dimension, which makes it easier to fit the shaft. However, a drop of Loctite should be used to be on the safe side. I noticed the M6 countersunk screws with cross recess, which I replaced with hexagon socket screws with 10.9 strength as a precaution.
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Very good product .Price quality wonderful ratio already fitted it into the engine everything fits hope it works long time.Not enough stock bought the last one.
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Very good quality workmanship fits the crankshaft wonderfully , never found this part anywhere before and the price is very good.
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The shaft is wonderful. Tested and tried by me in other engines. The product is for 6c. The bike is a 1945 M72.
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