bad plug bad plug cap stator
Impossible to answer, depends on what model KTM you have.
NGK Spark Plug BR8ECM
br9es, br9eg, br9egv, br9ev, rn2c, if it fould all the time something else is wrong
I have a 07 KTM 525 XCW and the manual call for 6mm on plug gap.
br10ecmix
0.60mm
NGK BR8ECM
We use the nkg br9eix
NGK BR8HS with a .032" (0.8mm) gap
0.7 mm
NGK CR8EK or NGK CR8EiX (Iridium)
In the center of the head (on top of the cylinder).