i wouldnt say either of those things would do that,i have seen plenty of bent tops on a plug and they have been ok as long as the ceramic part isnt cracked it will be ok.and taking rollers out will not cause it either this will just be like having light weight rollers.i would say its either losing its spark or the bike is running weak or maybe bad fuel flow.does it die totally for a few minutes or come back to life if you close the throttle.and have you checked to see if it has a spark just after it has died?its not uncommon for a speedfight to have spark issues!
adam bike doctor, March 2010
