If you want a hunting spark, then a miss, then not be at peak performance, then keep the plugs in longer.
+1 Hub. Why on earth would you wait until something's completely trashed, worn and failing before replacing it. The longer you wait, the more chances you take.
Always stuck with the factory plugs myself too. Just don't want to second guess anything that's so vital. Not to mention something that's not bloody cheap either. Over $80 a set in Australia.
Look ahead, relax & GO HARD!
2013 ZX14R SE ABS (aka:ANIML).Polished wheels,Supersprox sprocket,clear filmed paintwork,frame caps,rear seat cowl,ceramic coated Akrapovic headers,carbon Yoshimura R77s,H9 modded lighting,Zero Gravity screens,Ventura rack,tinted lenses,Genmar risers,Throttlemeisters,Pazzo levers,custom stainless radiator guard,Yoshimura fender eliminator,Woolich Log Box Pro,Zeitronix O2 controller,ECU flash.