Originally Posted by outofcontrol
I bought a new Iridium plug today and threw it in. Took a quick run 5 miles and plug was not sooty, and a nice brown.
With the last plug is was sooty in 30 seconds.
If this pushes me up over 70mpg and solves my problems.... $8 plug and 5 min of work???
It'll take me another week to find out driving 12 miles a day to work and back.
If it was my scoot showing that much improvement with iridium plug over regular plug provided the heat range is correct, I would review all of connections and components related with ignition system. Make sure there's no corrosion or crud build up preventing proper flow of electrons.