Hello ,
My English is not perfect so sorry for that. Recently I have bought KTM SX 125 2006 and sparkplug keeps breaking (like seen in the video). I don't know what's the problem , I have never seen something like this before. I discovered that coolant was leaking because of one of 6 bolts on top of the head , the thread is broken(it's not loose but not tight enough) , but others bolts are in good shape. Air screw mixture is 1.5 turns out as KTM owners manual recommends. Thanks for your tips , advices.
Lokheim.
MEGA LINK VIDEO