idlebar plugs were introduced when motors were being mounted inverted. it shields the element from the cold splash of fuel that comes into the cylinder. some engines do require an idle bar plug to run and it doesn't hurt any of them that i know of. the only thing it says on my Magnum xls paperwork is to run a hot plug. doesn't say idlebar or not, it runs just fine with a fox gold series plug in it. thing is with this and everything about this hobby, you will find people who use them and those that don't. go ask somebody a question about castor oil in you fuel and see how many answers you get!!
just do what you can to get it in the air!


john