You buy an HRC keycard coded to your PGM, by ordering it with the number on your PGM.

Once you do the splice I think you lose the brake light (or maybe just the front switch, or maybe I just need to change the bulb!), and the dipped headlight beam. Defintely no speedo. Everything else works I think.
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MC28 SE -sold-
MC21 with RS250 engine -for sale-
MC21 race bike -soon for sale-