Autolite Xtreme Sport Iridium spark plugs

Oct 28, 2012
Has anyone used the Autolite XS61 Xtreme Sport plug in their KTM 50's or mini bikes? When we first started racing motocross my son was on a Cobra 50 jr and we were told to run that plug. So I bought 20 of them in a sell-out. Since then we have switched to racing hare scrambles on KTM 50 Sr's. My son just turned 7 and will be doubling up classes and will also be racing his KX65 on a 4.5 mile track.

Would it hurt to try and run the Autolite XS61 plug in the KTM? Has anyone tried it?