what is this rubber o ring for?

[kaw Bill]

I just finnished installing the cylinder on my 96 KDX 200 and after putting all my tools away and cleaning up I found a 1/2-3/4" rubber o ring on the floor under the bike. I've done the top end on this bike a couple of times before and can't think of what this o ring could be used for. Any thoughts?

kaw Bill

 

[BRush]

Hard to say. Maybe the one from the LH KIPS cover. Here's a list of all O rings used on the KDX.

 

[rethnal]

Isn't there one behind the waterpump??????

 

[Gerg]

Is it one of the 2 o-rings that go around the end of the pipe where it goes into the engine?