ingition and clutch questions

Hi everyone. Name's Henry, did an intro post and now I am looking for some input

I got this little piggy sqweeling pretty good down low, here are the mods

Un corked, stock carb 175 68S stock needle slot 4. Twin Air intake, and WB E series with 12 plates
down low she will stand up with just a burp of the throttle, but feels like the clutch slips between shifts and full throtle also she feels like she runs out of revs too early. The bike is geared tall for off road.

so my questions, do these uncorked bikes need stronger springs? I am used to tossing Barnett;s into thumpers. and also would the bike benefit from a rev limit bump? say the XR only's unit?

any and all advice is greatly appreciated

thanks

You are geared for off-road and want more over-rev?

well if it is infact just over reving , then no I don't . But what it feels like is that the motor has more rev's to go, because of the pipe, and the motor is cutting out too early.

does that make sense?