Do a search in the forum & you'll find what all the basic mods are. HMF seems to be a favorite among ALOT of people but I don't have one so I can't say. I actually like the sound of my Supertrapp race series but hey different strokes for different folks, I'm not into big girls but maybe you are, lol! Anyway, a good pipe & air filter & proper jetting are the big 3. If ya wanna dig a lil deeper the +4 timing key seems to be popular & then you can change the sprockets too. What size are your tires? If they are a lil tall, you could go to a 12t front sprocket. There's tons of info here man & this is one of the better forums I've ever been apart of. Some guys on ALOT of forums are just douches!