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If anyone is interested on a price to get new seals put in, with the engine out of the bike and the top end taken off it cost me $100 labor for a shop to change crank, counter sproket, and shifter seals.

I wouldnt do a thing unless I put some good long rides on your bike. I too had a low oil condition on my 2000 KDX 200. I put in a full quart at every change. The sight glass is full and then settles just a bit to show the top of the oil. Early in the summer I notice quite a drop and was concerned as you are. Every scenario was considered and in the end, I took Eric Gorrs suggestion of using ATF fluid. ATF fluid has sealers in it and if it is a small leak past the crank seals the ATF fluid might close it up. I used the ATF for high mile transmissions hoping it would have a bit more sealer in the fluid. It worked and I have not had any missing oil since. The bike flat out stomps and all my friends on their new fangled race bikes hate me...... he he he. I think its a bit of a concern for this to be happening to your much newer bike like a leaking crank seal, but I would put some high miles on it and wait and see if the oil is still dissappearing. I always check the bike right after I get off of it and then 15 or 20 mins later to let all the oil drain to the bottom. With me, so far so good.

thanks meistro for the info. how long did you run the ATF fluid in your bike before you changed back to regular oil?

I havent switched back to regular oil. I run ATF all the time now. I believe this is a common thing with KDX owners for variouse reasons. The ATF works well in my bike. If I were you I would run the ATF and monitor the oil usage over the course of several 15 to 30 mile rides.

One more thing, I put a full 1 quart in the tranny. It fills the glass and then settles with a slight gap at the top of the window. I always check fluid with the bike straight up.