Thanks for all the imput. I might try the Autolites. I used to run them in my Evo & Shovel.

 

Denso Iridiums, not because I think they're better than everything else, just don't like running with the herd.

 

i was told autolite makes harleys plugs.. ngk and accel plugs are no good in hd

 

I thought I was wrong on another occasion but I was mistaken, but I believe that Champion spark plug is the manufacturer of the HD plug.

The autolites perform very well indeed but the heat range crossover for the same # in HD has a larger hex than stock size.

I've used the NGK DCPR7E's in my scoots for over 60,000 miles and they have performed excellent and in the other bikes that I put them in, they (the bikes engines) appear to start faster (less revolutions of the starter) than the stock HD plugs that they previously had in them (according to the other bikes owners).

 

I tried to run NGK plugs in my 07 ultra. I never would have believed it but they caused the check engine light to come on. Code was that rear cylinder was misfiring. Changed back to hd plugs and problem stopped. Resister problem I think.

 

Running Chamions. I found out that the Autolite doesn't fit the plug socket in my road tool kit.

Here's a ? for all of yous...how many of you index the plug when you put them in????

 

Autolites..........

 

have had no problem with the stock,run stock hd's

 

I'm using NGK's havn't have not had any problems with them was using Harley Plugs for awhile but NGK's are easier to get a set when needed when the parts store carry them and they are open 7 days a week instead of only 5 plus I have a O'Reillys a few blocks from the house. And they are alot cheaper.

 

I use the autolite myself. I just hate giving any more money to the Stealer.