Installing a Jet Kit
Here's some quick directions and description of what the parts are doing.
The "T", Hose, and Oil fill cap (replaces the stock cap – don't forget to move over the oring) all will install into the PCV system. Basically when you remove the carbs from the engine you will want to take off that 1/2″ hose. Cut about 3/4″ off the bottom and discard this chunk. Cut it about 3/4″ from where the last bend going up is, install the "T" fitting into that section (upper cut section) aiming towards the rear of the bike, and re-install it back into the PCV system. The black hose will fit onto the barb facing rearward and routed back and down to the new oil fill cap (don't forget to move over the o-ring from you old fill cap). Essentially you are "Teeing" into that system and making it pull a vacuum in the crankcase. This aids in ring seal for more power and economy. I have found that it is sometimes easier to cut all but 2 barbs off of each section of the "T" so you don't have to fight it on.
When installed it will have that rear facing barb right under the carb rack brace with the stub sticking up to connect to the base of your airbox like it does normally.
You can start with a 157.5 main or 160 main if you are using the stock needles. Typically other aftermarket needles run richer so you would start with a smaller main. Either jet size will be close but these bikes do like leaner more then richer. The rest of the install is much like the stage seven. You can drill the slides with the supplied drill bit if desired and change out the springs. This allows for faster throttle response. They will work with out drilling too. You can unhook the v-boost in the open mode if desired or leave it stock (I like the stock position myself but wide open gives a bit more rump sound). Don't enlarge the center hole where the needle passes through but rather the hole off to the side.
The brass air correctors install with the flat side downward into the air inlet hole on the top of the carbs. It's right next to the hole that has a jet in it. When you see the correct hole to install it you can look into the hole and you will see a thin walled brass sleeve down inside there. Put the flat side down and start by hand. You should be able to get it about half way started. Use the small punch that was included to drive the corrector until it is firmly seated which will be well down into the bore.
Don't forget to sync the carbs when you get it all back together.