So I just bought my first 250 2stroke, a 94 YZ250. It's an old bike and its been thru a couple not so caring owners evidenced by the radiators. Lately I started noticing that whenever the fork compresses, a ring of what looks like oil is left around the shiny inner tube of the fork (the half of the fork that attaches to the wheel). I dont know if im just being too paranoid for my toy but I wanna know if this means that something is wrong with my fork seals or they need replacing or whatever it is.