My mate finally got his cylindrical grinder sorted, so was able to grind the existing cam off the distributor for my project (as members may recall, I decided to modify a distributor to 60* to replace the magneto currently fitted as I%u2019m having extreme difficulty starting it). 1,000cc and just under 9:1 compression means it goes over TDC too slowly for a decent spark, even with the front cylinder decompressed.
I%u2019d already made the replacement cam so fitted that today. Next job is to see whether the rotor arm will align with the dist cap pickups or whether I have to make / modify the rotor arm as well (remember the cap pickups are set 180* apart). I%u2019ve not yet cut the rotor arm locating slot in the cam, as I%u2019m hoping I may be able to fudge the location and use a standard arm. Whatever, the rotor arm / cam location is going to be critical. Onwards and upwards as they say....
edit/ update.
Last night, after a bit of fiddling about, came to the conclusion the rotor arm would service both dist cap poles with the new cam, so this morning (Sunday) I machined the locating slot for the arm. Just waiting now on delivery of an m4 allen screw to lock the bevel gear to the shaft and then I can fit it to the bike and time it up. Got allen screws / bolts coming out of my ears in imperial and metric, some up to 200mm long - but no m4!