Big 3 as always for starters - intake, exhaust, and a good proper tune. At your point port work and a head mod (re chambering) will give you the most noticeable gains and a good set of reeds will improve throttle response, bottom end power and overall a slight gain across the board. I like v-force reeds personally but oppinions will differ. Advancing your timing about 4* will also give you a noticeable gain. A larger carb when used in conjunction with the right mods will net you more power on top. There are better options for exhaust also other than the fmf tho it will do fine for now, theres always upgrades available. Once out of options with your stock bore and stock stroke there are always bigger options there as well. Anyhow, just a few things you can consider in the future