TOPIC:

If you are saying A4 then Partzilla shows only one and doesn't show any compatibility with other models. The part number is 21007 - 1048.

It is a shame Partzilla doesn't show compatibility for European models, like ZG or Z. It's an American company, maybe that's why.

I am putting an engine together from whatever available parts, so nothing is set in stone. The case is 1980, and comes with those small ignition pick up coils mounted to the upper case. A4, like your bike, has them on the right side of the crankshaft. So, I can make this engine to whatever I want, depending on availability. I am considering adding a second charger on the left, and pick up coils on the right like in the A4 model (if I find pick up coils and CDI, regulator would also need to be changed). I will be posting about it in the future to report and ask for advise. If I discover something regarding your needed rotor I will let you know.

1982 A4 for reference.

Looks like you cant see the number on the rotor when its fitted.

Well, yes. It's on a running bike now. I will be removing the cover soon when checking the valves, maybe I can see those codes. But no promise. I'd just buy one from Ebay.

Looking at the flywheel from a DFI ( GP9327) it appears to be the same apart from it looks as if the timing is slightly different, I was thinking if I got one of these as they seem easier to come by I could get a new keyway cut using my original flywheel as a guide.

ogri211 wrote: Looking at the flywheel from a DFI ( GP9327) it appears to be the same apart from it looks as if the timing is slightly different, I was thinking if I got one of these as they seem easier to come by I could get a new keyway cut using my original flywheel as a guide.

Why wouldn't you just remark the timing mark and leave the keyway alone?