Heinz Kegler clutch mod

With reference to the Heinz Kegler clutch mod;

https://www.accessnorton.com/Norton...these-amc-gearbox-clutch-centers.10997/page-2


Has anybody done the clutch centre for a Dommi yet?

When I spoke to Heinz about his clutch modification he told me he had gotten unmachined blanks from the tool room to experiment with. This was back in the 60's. He used them up and at the time couldn't get anymore, maybe RGM or Andover Norton has blanks. It is easier to machine the basket than the hub which is what Heinz and Brian did 20 years ago.
John in Texas

Thinking out loud, would doing just the outer give a partial benefit.

Beng's comment seems to point that way

Heinz Kegler, because an infinite number of factory servo clutch inner drums was not available and in fact limited to a handful, found it easy to take a regular clutch outer drum and grind an angle into it. In fact he offered this service along with his work on brakes, setting up clutches and manufacturing his swingarm collars.

Unless I can find who makes the clutch, and obtain some unmachined outer blanks, it looks like I will have o make the whole thing up . . . . .

I looked into it but the machinist wanted way to much money for the job. If time is no object and you have a spare basket to practice on I think it could be hand done by cutting a template from thin cardboard or a thin sheet of plastic (perhaps from a milk carton?) to match the length of the segments on the basket and cut the 19 degree angle into the plastic. Then align the straight end of the plastic with the rear of the basket segment and mark the cut. "front" and "rear" directions mean front and rear of the motorcycle. I predict a lot of time with a hacksaw, dremel and file will be needed. But if it works I think the spring pressure could be reduced quite a bit.

I am experimenting with the O-ring primary chain available from Andy the Chain Man. The length I ordered is tight with the transmission pulled all the way forward and will require relieving the trans slot in the mounting plates a little bit, perhaps a 1/16". I could order it one link longer but I fear the the trans would then be sitting at the rear of the slot with no more adjustment left. And, I do not want to throw away an expensive chain. A half link is the answer but Andy does not provide one.

2nd...I used a pair of the Emgo replica spanish Amal levers available for less than $30/pair and the Atlas clutch is now easy to use. I make my own cables and the barrel fitting on the lever end needed some grinding down.

I have not costed it up yet, but I could do some blanks (the right material) on a lathe, drilling a centre hole that would fit on a milling machine arbour to use as a mantel, the helix can be cut on a dividing head with the correct gears, that’s easy, it’s the centre/rubber stops that may require a rotary table and vertical mill to get right.