Join Date: Jun 2008
Location: Edmonton AB
Motorcycle: 2014 675R, 2019 Husky TE300i, 2014 Grom. Yes, Grom, fuck you, it's fun.
Re: Spark plug fore more HP
Wait...changing ignition timing does nothing for you? Are you sure?
I am going to go out on a limb (no, not really) and say that whatever plug that you use won't matter that much. Nailing down plug numbers involves way more engine work than you are even remotely doing.
As far as "EIX" or "EIA," how often are you gonna change the plugs, anyway? Anyone who does 5 or 10k a year and changes the plugs every season is throwing money away, let alone paying double the price for the Iridium.
Unless you are going nuts with engine mods, Iridium plugs simply last longer and offer no performance gain... and regular plugs last longer than most people use them for, anyway.
"A girl phoned me and said, "Come on over. There's nobody home." I went over. Nobody was home!"