[xpanmanx]

Hey guys, I’m doing a plug change today on my 2003 1800 C. The bike was new to me in August 2013 at 7k miles, and I last changed the plugs in May 2014 at 10,750. Here in the summer of COVID-19, we’re waaay overdue at 6 years and 11,500 miles.

The original plugs were the NKG Laser Iridium, not sure of the p/n. I replaced them with Bosch Platinum +4 4419s. Today those are coming out and NKG 6502s are going in.

I’ll attach some pictures of those 4419’s, which are in pretty darn rough shape after 11,000 miles but in fairness, I don’t know what they would’ve looked like at 8,000 miles.

The bike has a Power Commander 5 which I installed in 2014, but no way do I remember which tune I settled on. I should probably get a dyno and tune this summer.

Enjoy the pix

http://imgur.com/a/wkesXpp

 

[Silver F]

do you know.. the Iridium spark plugs are 100,000 mile plugs

my 2005 has 92,500 miles and still running factory plugs.. I got the Bike NEW...

 

[IndyX]

If not for the idiot owning bike before me trashing plugs from running with enricher always on I might still have same plugs. Couldn't get them clean. Not touched plugs after replacing them. No need.

 

[PaXman11]

Just for laughs a couple years ago, I ran the 4419's for a full summer, didn't notice ANY performance or economy difference, 1 way or the other, so I put the stock NGK's back in, and haven't missed a beat for a couple low mile summers now. Another of the things Honda did that are better than aftermarket stuff.

 

[Duug]

I have the 4419s. They are easy to clean with a wire wheel on bench grinder. Mine have been in use for well over 50K miles without any obvious wear. As well using 87octane will help keep'm clean.