any one have a chart I would like to try new plug's and was wondering what would be the best plug for a 07 FXDC ?

 

Do a google search for "nightrider sparkplug interchange guide" you'll find some info there.

 

Spark plugs are going to make the least difference in your motor. Having just said that though, you need to make sure they are good ones. I just installed HD's double platinum plugs in mine. Shouldn't have to worry about 'em for a while.... less than 15 bucks for the pair.

By the way, this was posted in another thread asking about spark plugs. Interesting thing though, the local Schucks could not cross reference the part numbers listed. (doesn't really surprise me though).

http://www.harley-performance.com/ha...park-plug.html

 

There is nothing better for your 2007 FXDC than the stock spark plugs. Do not waste your time or money.

 

The latest issue of Thunder has an article on spark plugs and they suggest that Iridium plugs are the way to go. For the 88 and 96 the plugs are:
Denso=IXU22
NGK=DCPR7EIX