I did the wire splice on my old R and never needed to rejet.

have a read here http://www.tyga-performance.com/pages/mc21wiresplice.php

Tyga dont mention a re-jet, all you are doing is taking the 112MPH restriction away, and I am pretty sure it doesnt mention a rejet on here either.

sooooooooooooooo whats ya beef
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MC21SP - Roth-tax
CBR400 - track
MC21R - sold
MC21SP - sold