HRC, Honda Racing Corporation.
While fully off topic a endurance harness from HRC comes with brake lights, main lights, tail lights and all warning lights plus light switches, brake switches etc. Not that HRC made one for an NSR250. They did make them for the RS500 though.
I would have to go for a wire splice, why buy a box when its so easy to do yourself
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If I have to take the carbs off once more...