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Motorcycle engine - parts
K750 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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Motorcycle k-650 from 1970, Almot brand does not need to be recommended to anyone, a top-shelf product, the pin matched after a slight heating of the piston can be pressed in with fingers with slight resistance, the fit of the piston with the cylinder at 0.07mm(which is as it should be). And most importantly - the rings finally changed from another supplier(the previous ones added to the kit could be thrown in the trash), fitted on the locks as written in the professional literature. After assembling the engine(obviously a complete overhaul with all the rigors) - left cylinder 8.5Atm, right 8.6Atm. The engine fired up in 2 kicks, after driving 150km - it runs nicely, no smoke. I recommend Almot product as much as possible.
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First time buying from "Duells" products seem to be very good quality and with this workmanship I think I will increase engine life.Unfortunately availability is limited,friends of mine wanted to buy , but there was no stock,,!
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Liebe Freunde, diese Kolben und die Komponenten machen einen sehr guten Eindruck. Auch das Kolbengewicht ist angemessen niedrig. Im Fahrbetrieb sollte man diese Kolben nicht zu mager fahren. Viele Grüße Bernd
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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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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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