I agree stick with stock plugs

 

:i con_ditto:

 

I fall for this stuff a lot. Have a set of Autolite Iridiums I'm gonna put in next. Used splitfires, all kinds of stuff. They all work as long as the bike is tuned well. Yet, I still try different plugs just to see. Haven't seen anything yet either. I was gonna try some of these Taylor wires too, to see, and they'll either work as good, or not as good as stock, but I'll try it anyway. Boredom I guess.

 

i use harley gold. they're the best plugs for harleys. r12-g. the iridiums, platinums, splitfires are just hype and gimmick. R12g's work great. use anti seize on the threads and gap them. never depend on them to be gapped properly out of the box. torque them to specs and get out and ride.

 

I was going to buy a couple of Pulstar iridium plugs and sent an email to them asking for more data and pricing. They replied ealier this week and the customer service rep didn't know what size engine was in a 2007 Fatboy. I am not so sure that I want to do business with a company that doesn't know what size spark plugs go in my bike. Can you say, "Punch a hole in a piston?" There is only one motor offered in a 2007 Fatboy. Isn't it an 80 C.I. Evo? or is it an 883?