it doesn't improve the performance of the bike but you will get a better and hotter spark with a brand name plug, i found my bike ran heaps better with a NGK plug, it ran smoother.
also the cheap ones that come with the bikes die without warning, alot of the guys on here will back me up that you need a good quality plug as you don't want to be stuck out in the middle of nowhere and the only way home is to push it. trust me this has happened to me.
Hey, I have a gen. 2007 Pitboss 125cc Twin Spar and goin to put new bolts throughout. Tuffer sturdier ones. Any one have any ideas on what to buy and where to buy them. I live in QLD also so if you know any places around here.