Alzazorq wrote:Why do the cases need modifying Andy ?

I think Andy means if you're going to the trouble of fitting a PGM-II system you might as well modify the cases to make the best use of the ignition system.

Any flywheel will fit as long as its matched with the correct pick ups from the right model.

Or you could go the RS/F3 route...
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If I have to take the carbs off once more...