and one know if there are aftermarket cams, pistons or heads for the stock f4i??
looking to build a hot set up for the track
or any full exhaust systems that are nice quality??

HRC has cams and I believe arrow made full exhaust systems along with a new ecu and other things.

After much research into the same area HRC seems to be the only ones who make cams, valves, springs etc for the bike. BRING YOUR WALLET, stuff is expensive, not to mention extremely hard to get.

Are you looking at racing, or just track riding? If you are just doing trackdays and really need that extra power spend the same money you'll spend on heads and get a used 1000cc. If you are racing it watch your classes and the rules for head modification. I've found the f4i a decent competitor in stock classes with little more than a gear change and 1/6 turn throttle. You can do that for a few hundred bucks and it will be like riding a new machine.

another option is to do a port and polish on your current heads. I had mine shaved 10 thou, as well as a small cleanup on the ports. I just picks you up some compression. Make sure this is done by a really reputable engine tuner. Expect to spend big time though, and about $1000.

thanks for the input i saw the HRC stuff im too poor for all the mods i want haha join the club
i want to do some racing with it so maybe ill look into the shorter throttle hook up and change the gearing
are there modded classes for 600cc??? ill keep mine stock untill i have a race dedicated bike