If a HRC box is installed with a Road loom, then all the multi-connector wires have to be spliced into the loom, which is actually a bigger job than the manual derestriction wire splice!!!
So, if you have a road loom and want to derestrict, splicing is unavoidable, just a question of how much.

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Rich
MC21 Track Bike / RS250 NF5 'Spencer', NX5 'Cadalora' & NXA 'Aoyama' / RS500 / Two Brothers Racing RC30