There could have been a big problem. I swapped out the factory plugs Autolite 5682 for a set of NGK NGK ILZKAR7A10 plugs a while back. Last couple short rides my quad has been running rough and seeming like it lost a little power so today I pulled my plugs only to find the front plug bent almost to the electrode. I looked in and could see indents in the carbon on top of the piston. Long story short after measuring the best I could it appears that the NGK plug has a longer ground strap by about 1.5-2 mm. I thought that the reach determined that but that is only for the thread length. Put the stock plugs in and went out and did a bunch of top speed runs then pulled the plugs again and all appears good:wiggle: