I have been using NGK for about the last 10 years, but have had problems lately. We had one quit last night and low and behold it was the plug. I've tried alot of different heat ranges, and have always tried to have the jetting right so as not to foul a plug. But I have had them just not work. (no spark for no apparent reason) This week alone, in 3 different quads, we have went through 5 plugs. I'm starting to think not everthing is my fault, maybe its the plugs fault? Anyways, what brand are you guys using? Thanks!!

 

i like champion plugs, in everything from cars to toys, boats, etc. Something about they way they run, they seem to run a little cooler that other plugs. Never had an engine problem due to a spark plug, Seems like the NGK's liked to burn the tops of the pistons in my old man's Enduro bike, he switched to champion and havent had any more problems. I dunno. Dont fix it if it's not broken, right?

 

i run the iridium plugs and they hold up great, whatch your plug temps they can smoke a piston fast ,ngk,