2014 trx 250 xe

Hey all! I was hoping to get some feedback on best bang for my buck as far as full / slip on exhaust, jet kits, and air filters. I just picked this thing up a week ago and probably have about 14 hours on it. I am an adult rider (240 lbs.) and this little red devil will do 52 with my fat a** on it. Just hoping for a little more. Any help is greatly appreciated.