It is very easy.
If you already have the re-jetting done with the Honda Power-Up jetting mods ( you should) and the airbox mod you're only looking at maybe backing the fuel screw out a quarter turn,or until it doesn't decel pop. At the most you may want to go up a main jet size, but my buddies didn't require that at all after adding a complete exhaust and after the Power -Up jetting and ran great.
gte that 15 tooth countershaft sprocket on it too, you'll be glad you did and sorry you waited, just like the re-jetting

Doug