Thanks so much for the info, it really helped!Have you tired Dave Silver or CMSNL in the Netherlands? If they can't help you can always create one from scratch. That's not as hard as it sounds and Matt (Sonreir) at Vintage Connections can supply connectors and wire and even has Silver sleeve material and silver tape to make it all look OEM.
I don't have a harness, but you might try Sparck Moto
What color is the bike? I've been restoring my ST90 (for my daughter) for a few years now. Not a full restoration, but fresh paint, some chrome, new rims and spokes etc. Engine might be done in another couple of years or I might replace it with a Lifan pitbike motor with a proper clutch and shifting.
Currently spending the winter in my basement, but will haul it out in a few weeks and finish it off.
I'm struggling to find a decent condition front fender. Mine is pretty badly rotted and not worth re-chroming.
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I talked to the guy at Vintage, he's going to get back to me. THX!