Alright folks,
I havebeen trying to find a 13 tooth front sprocket local here (preferably the Kimpex) with no luck. So I turned to the web with a Kimpex part number of 101006 (theone quoted most here)and was unable to locate the sprocket. But with a little searchin I came up with this: http://www.kimpex.com/catalog.php?page=614&show=1It appears that the 06' KLX 250S now has a set of uniuqe part numbers all its own in the Kimpex catalouge,listing all of the diffrent size combination. Now timeto find a local distributor.

Boy did I screw that up, the link is not for the sprocket page but the page is there page 614 (trust me I am at work and not home on beer) anyway the 13 tooth part number for the KLX250s is 004983

 

Here is a little more info:
Contacted Kimpex, they wont sell direct but they put me in contact with Bethany atReds Motorsports, they can drop ship Kimpex products. Her number is:800-451-5281

The cost for the 13t sprocket from Bethany delivered to my door $17.99