I just typed in a request for the correct spark plug for your year model bike and the "5" is the answer I received.
My book for my 2006 1500 says to use the DPR6EA9 on my 2006. My limited research for your year model says to use the 5EA9. The "5" is the hotter plug and the difference between the 5 and 6 is determined by the length of the stroke for that particular engine. If your book calls for a specific plug then that plug or the same type on a cross reference would be the one to go with.
The manual was written by the folks that designed the engine for more than just a reference, but it's your bike........
+1 to Bandit
06 1500 Classic FI (Anniversary Edition)
Reward the truth, punish the liars...Ted Nugent
Last edited by Dean; 03-11-2014 at 12:32 PM.