Ive no info on where to get new terminals but its a common fault with the R/X, and the wiring is really bad workmanship its unreal. I had my kill switch wire corrode through once and lucky enough it was a saturday and was only down the road from home so could get picked up easy.

Lucky enough the rest of the connectors were not too bad, so i just silconed all the ends and the connectors, then made a home made rubber flap to stop any direct water or road crud from just bay passing the forks and going straight onto the connectors.

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Plough on