I ran that setup with stock carbs and SLP pipes on pump gas AND with 35 pwks on race fuel. If this is your play bike I would run those stock carbs and pump gas as it will save you a lot of money on fuel and you will have great MPG. Your low end power will be great. If you are riding in the sand, like the dunes, some shifting Mods like a cut shift star will help, id say make sure all your shifting mechanisms are in spec (eccentric screw, shift arm with all its counterparts.) The sand will put a lot more load on the motor and possibly make it harder to shift. I did a pro mod and it helps a lot with that, but if your not sand riding id say just get the shift star. A billet clutch basket is a good investment as well, driveline sells those as well. While your in there make sure all water pump mechs are good too (bearing, seal) that should come with your bottom end gasket kit, billet impellar isnt really needed but a billet water pump gear is a good idea. so to recap
-billet basket
-shift star mod
-all shifting mechanisms parts are in good shape
-billet water pump gear