Thanks Andy. Yes those are the questions I have asked myself. First one is easy. I don't care about originality, as this is a race/track bike only and i ended up having to buy amn MC28 engine from Japan so the originality ship has sailed. as for which i have the most of, well, I have the PGM II unit and matching carbs and have to assume all the carb attachments match. I think the regulator is compatible. I can get the wiring harness no problem. I have no idea what happened to the original R4J harness as the bike has been through a few hands, some of which were not too careful to keep it all together. Hopefully RobH can confirm the rotor but pretty sure the 3MZ came off the original R4J motor so it might not work. Not sure what you mean by the pickup coils. The alternator on the bike now is i believe from the MC28 engine since the R4J was in bad shape.so as of now i seem to have more PGM II components but have to confirm i can get any others i need.

so next questions: is the alternator coil an issue and if so, how to identify the correct one? and same question for the pickup coils?