Welcome to the BHQ and congrats on your new banshee and having a cool wife. First the boost bottle really doesn't do much for enhanced performance but takes place of the cross over tube connecting the two air intakes between the carbs and reeds together. But since you have it, leave it there. Not exactly sure how the triple clamps work but they are holding the Tag handle bars to the steering stem. The sprockets are the two gears your chain wraps around and Renthal is just a brand name.
Here are some links to help you out
Boost Bottle
Renthal Sprockets
TAG Handlebars
Also you might want to start calling your DG sissy bar a DG Grab Bar. It sounds alot cooler. And like the post stated above if your having fun in 5th gear go ahead and pop that baby up into 6th and you will really fly.
Search Amazon.com for a Clymer's Manual for your new shee. That is the best tool you'll have in your toolbox.
Have fun and always check back here for all the info you'll ever need on the banshee.