Don't worry about it now. I worked it out from scratch, by pulling all the looms to bits and rewiring. Have now sold the bike and only have 18/5's and 21's left and I have wiring diagrams for them
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NSR250 mc18/2 to be fixed and sold
NSR250 mc18/4 ( two of) to be fixed and sold
NSR250 mc21 (two of) One now racing /other to be race backup)
Sachs 150 bucket
Cagiva 650 Raptor