I know my bike has its fork seals blown when I got it. As far as what to look for and preventative maintenance, what should keep an eye on. I dont know how fork seals work (im sure the name says it all), and I also know that this is a common repair after certian milage (at least I think I do). But when should one expect the seals to go out? What do you do? How much is a common cost for repairs? etc. Just wondering for the next time...