Which spark plug

[chevykdx]

I recently got my 1989 kdx 200. and some bozo owned it before me, and filled it with spooge and fouled the plug. SO MY QUESTION IS, WHICH PLUG SHOULD I USE, AND WHATS THE STOCK ONE.

 

[Twiztid One]

go to ngk.com for the plug info and the spooge is from your bike being rich .

 

[89kdx200rdr]

stock plug is b9es. works fine for me.