I picked up an '02 KDX 200 about a month ago and have put about 200 miles on it so far. Great bike for my riding ability-added the standard guards and so forth---my complaint is the stock chain. I lubricate the chain religiously and always maintain proper tension. I've had to make four adjustments so far. I'm on the sixth position on the snail adjusters and run a consistent 2.7" between the swing arm and chain. I realize that the 200 gets the non-O-ring chain from the factory, but is this amount of stretch normal? Can anyone help me choose an O-ring replacement? Any help would be appreciated. This site has tons of great info. Thanks to all.