Yeah yeah yeah..same old etc...
But I forgot the answer!
From m0rie's comment, the KDX is one bike that you can replace the 
seal from the OUTside?
92049-1068   
BuyKawi shows this as the 
seal for the '89..and it is placed from the outside.
92050-033   
 
..is the 'H' PN, different part, but placed the same way...from the outside.
OK..I guess I 'remember' now? 
 
By 'dental pick' you are referring to a mechanic's scribe sort of thing, right?
That looks like:
If so, get a good one.  The cheaper choice is not the best. Usually black in color, they break/bend quite easily.  Get a silver colored one.
Now THERE'S some technical info for 'ya..the COLOR matters!!
From 
 here:
..they cost $5.
I've paid less.  Don't know about the quality of the pictured one.
I see no o-rings listed on the BuyKawi site...
**edit #four..darnit##
When I look at the bigger picture, it IS black!!
OK.  From my experience, the black ones are not worth it..and I've paid a whole lot less than five bucks!!  More like $1.  Maybe $5 is the CAN price! 
 
Hope this helps! 
