want to add a 38mm carb to my 01 cr125

i want to add the bigger carb in hopes of gaining more top end power.i know what i gain on top i will lose off the bottom but thats fine with me since i will keep the stock 36 and if at any point i want some of the low end back,just switch them out.my question is will i need to mod anything to bolt up the bigger carb such as the intake boot or air box boot?any baseline jetting suggestions?eric suggested i try an sst pipe and silencer which i will be ordering very soon since all the searches i have done on it seem to yield good reviews.as of now the bike had a v-force reed cage procircuit pipe and the stock silencer.any input will be much appreciated