Doesn't IR on a plug mean "internal resistor"?

 

According to the manual it means iridium tipped.

 

TexMud, after searching NGK-USA and NGK-LTD Japan to no avail I did find a vague reference to iridium plugs by NGK at the following NGK-UK website: http://www.ngk.co.uk/news/20010125.htm.

They appear to be new and from the news article they are listed in the 2001 Motorcycle Applications catalog...in the UK anyway.

I guess we'll find out more about it as time goes on. Meanwhile, if I were you I'd find a similar plug from NGK that will fit your Ruby and mount that $18 sucker in a trophy case on the wall! Goldwingers will flock to something that expensive, but hard to imagine much of a market in the ATV sector.

 

TexMud, could you please take a look at my Ruby plug at:

http://members.tripod.com/~fergiberger/plug.jpg

I have only 60 miles on the Ruby and wondered if I need to replace it already. It's obviously running rich and I wondered if letting it warm up with the choke on would do this. The gap is .81 mm. BTW, I've emailed servicehonda.com to see if I can purchase some extra plugs. Thanks a lot!

 

I found some information about the iridium spark plugs under the cars/trucks/suvs, here's the link.

http://www.ngksparkplugs.com/product...idiumintro.asp

 

up2snuf, If the plug still works then there is no reason to replace it. The Rubicon runs rich from the factory. You may want to look into going down a jet size. I went down to a 152 main because of this.

 

Wannabee, I have not had a problem with my plug and I dont plan to replace it anytime soon.

 

After reading that post I am willing to pay the price if I ever need a new one.