there's actually no need to use Zedder for Kawasaki parts Leith. If you go to Kawasaki.com and search the microfiche which is quite comprehenive, find the model and part number and click on it, then you'll see a little yellow and black '?' mark tab at the top of the pop up page that opens. Click on this ? tab and it lists all the models the part suits. I reckon Kawasaki may have had the worst parts supply in history but they do have the best up to date online parts listing presently available to the public
sometimes the model you require will not show in a specific search so use a general search such as 250cc motocross all years. I think the KLX is actually listed as an offroad playbike. On the home page the parts diagrams can be found under the owner info tab on the left. Here's the list but showing as not available for all
Part Number 92046-1001
Model (6):
KLX250-A1 (KLX250) (1979)
KLX250-A2 (KLX250) (1980)
KX125-A4 (1978)
KX125-A5 (1979)
KX250-A4 (1978)
KX250-A5 (1979)
my budget method of repair would be having a pair of phosper bronze bushes turned up