xspire wrote:
Thanks Andy. I see that the parts manual lists a few different control boxes depending on the serial number of the bike. From your experience do you know if the boxes are interchangeable, or do I have to get one from a specific series of MC18?

Only the MC16 and the 1988 MC18 use a separate RC Valve control unit. I expect they will probably be interchangeable, but whether they use the same RC Valve timing is another matter.

However, I expect any part number (control unit) from an '88 MC18 will work on any other '88 MC18, irrespective of PGM-I/frame number.

Make sure you have your RC Controller/RC Servo/PGM (or CDI, in the case of MC16) terminology correct. Not saying you haven't, but there are comments on this thread now that are starting to confuse the topic.

For reference only:

1987 MC16 -- Twin CDI's, with separate RC Valve control unit
1988 MC18 -- PGM-I, with separate RC Valve control unit
1989 MC18 -- PGM-II, with integrated RC Valve control circuit
90~93 MC21 -- PGM-III, with integrated RC Valve control circuit
94~ MC28 -- PGM-IV, with integrated RC Valve control circuit
_________________
Andy.
NSR-WORLD.COM

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