Hi just rebuilt the engine on my mc21SP and done the wiring splice do I need to alter the jetting?

If I do need to alter the jetting does anyone have a suggestion what to?

sorry should have said the rest of the bike is currently standard

going out on a limb here as im not a techy but id say, run it for a while do a plug chop or 3 and see hows its running, mine was deristricted (okay it was a black box) but was in standard trim and didnt need any twiddling, it was only after i opened the airbox, put pipes on etc that it needed looking at!

i ran my R with standard jetting after deristricting it with the PGM and gearbox wire splice, had no problems at all but.......RCs advice is good.
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MC21SP - Roth-tax
CBR400 - track
MC21R - sold
MC21SP - sold

Simply doing the wire splice will not alter the mixture ratio going in to the engine, so you should be fine. However, unless you've done a plug chop and are certain it's running safely rich before you made a change, you can't really be sure it's safe anyway!
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MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

Cheers for your help on this was just a bit concerned as in the tunning section on carbs it gives information for using a 145 and a 148 main when using an M-max box