hi, I just bought an '01 70 today, runs like a dream, the last owner had a k&n filter on it, no airbox. is it worth getting the oem box for it? i'll use this for a pitbike, but I don't like the idea of water getting into the top end through the filter. I added a layer of pre-filter wrap on it when I got it home that I had laying around the garage. any other tips would be appreciated, I'll need to replace the fork seals as well. thanks!