We'll need to see some pics and know what mods you may have already.
If it is still stock you have probably noticed the first mod is usually a new exhaust. Too bad Yamaha can't sell the Warrior with a better looking exhaust, but it is ugly. You will want an after market seat too. The stock is not designed right for comfort. One of the members will modify the stock seat and make it what it should've been. I haven't done that yet, but want too. I have read a lot of positive posts about this and it costs a lot less than buying new. I found out about this after I had my Mustang Vintage Tour seat, which is a very comfortable seat. Also high on the list of mods is changing the handle bars. Now that your confortable and you have gotten rid of the water heater there are dozens of mods you'll probably want. The more you browse this site the more mods you will want.