Not being an expert, I knew there was some info on the site but forgot where it was. Details of carbs is here http://tech.nsr-world.com/nsr250/all-nsr250/nsr250-stock-carb-settings.php
MC21 has a gear indicator. I expect the carbs and PGM are used to restrict. I assume your KISS PGM and TA21 carbs provide a good derestricted setup without needing a wire splice
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Why do things simply when you can complicate them