Above advice is good.
Buy a cable luber $10 they are a must, I have also found the real expensive single purpose cable lube solution of great value.This lube performs way better than a WD40, it is designed only for cables.
Make sure when you attach your throttle sleeve it is not butted right up on the end of the bars, allow a few millimeters so it doesn't hang up.Also try your throttle at full steering tilt to make sure it doesn't pull or bind.Nothing worse than turning your bars and having instant throttle.
Oh yeah take the top of the carb off when lubing so you don't shoot crap into your carb, Yes I have seen someone do this.