I would take FZ1NH up on his offer.
But if you decide to roll on your own - there are step by step instructions on just about any mod that you want to attempt. Just use the search button.
If you are looking for a some popular modifications:
Suspension upgrades are real popular.
I have upgraded every air filter (to K&N) and exhaust (I have M4) in every vehicle that I have owned. I just like the deeper/aggressive sound. There is also an airbox mod to allow more air in. I personally do not think getting an entire exhaust (headers/pipes/slip on muffler) is worth it. It's only a few hp gain for around $800. But it's your money and your bike. You can do anything that you wish. Some guys have done the full upgrade and swear by it.
Not sure if you have a Gen 1 or 2 but the Gen 1 has a carb and there are carb kits to give you more horsepower. If your Gen 2 - you have fuel injection. There is a Power Commander that allows you to program your fuel injection. Sounds complicated but I have heard that it's not too bad.
LOL - Lot's of people MODIFY THE SEAT!!! HAHAHA. I personally think the stock seat is OK but you will hear a lot of complaints. My butt starts going numb after about 350 miles. After about 700 miles - it hurts!!!
A lot riders talk about brake lines/pads as upgrades.
Plus - pretty much every cosmetic upgrade you could possibly think of.

Carbon fiber is real popular right now. Different kinds of grips are real popular as well as foot pegs/ rear sets.
Just google FZ1 __________ (fill in the blank)
Partshark is the best deal on prices as a whole. You can catch sales at other places but that is generally going to be your best deal.
Welcome to the addiction :cheers: Your billfold will feel it - I promise
