An F4i would make a fine track bike, ESPECIALLY if you pick it up for $1700. The fork springs are light, I put Race Tech springs in mine, and have the stock rear spring. they offer springs and valve kits. to upgrade the stock forks to an acceptable level would cost around $250-300. The cool thing about Honda, though, you can put a different front end on it from newer bikes. say, a cbr1000. Also, a cbr1000 master cylinder would be a good idea as well. Depending on your height, the clip-ons might hinder you, and if so, theres a write up on how to convert it to below the triple clamp. It requires cutting somewhere, though. If you do that, you'll probably want to relocate the rearsets as well. You wouldn't have to spend TOO much money on making an F4i a good track bike, IMHO. Plus, F4i's are really tough. There's a reason many stunters prefer this bike. The engine(my 03 has 40,000 miles, and i've seen videos of a 200,000 mile F4i with only regular maintenence done), frame, subframe. I've heard of the swingarms splitting at the welds, but if you add some washers in between the wheel and swingarm on the axle, you'll be good from what i hear. The swingarm...arms...get pinched too much, putting too much stress on the welds, so you take up the slack with the washers. For a minimal investment, I'm positive it will meet, or exceed your needs. ESPECIALLY total cost.