Plugs

[MikeFossl]

Has anyone tried the NGK BPR7 EIX Irridium plugs?

[Bob_Roller]

That number looks like a resistor type plug, don't know how much, if any difference it makes, but the spark plug caps have 5k resistance already .

You can use 0 ohm caps with resistor plugs .

[montmil]

NGK makes some excellent sparkle plugs for our Airheads. IMO, this is not one of 'em. You may end up spending additional money just to match the new plugs ignition requirements to what you already have. If'n it ain't broke, is there any reason to fix it?

[MikeFossl]

So for an 84, NGK BP6 ES or BP7 ES, I'm getting conflicting fitment advice out there on the net.

Thanks

[montmil]

My 1981 and 1983 R65s have run happily for many years with the NGK BP7ES.

[Bob_Roller]

I don't know about experience with other plugs, but I never saw any difference in engine operation, etc. , with regular Bosch , Bosch platinum, NGK copper, and regular NGK plugs in coming up on 35 years of owning my '81 R65 .

The only difference in the  NGK plugs you are considering, is that they are a different heat range .

Due to the incessant heat here, in the northern Sonoran desert, I use a colder plug .

[Barry]

The correct heat range is BP7ES  but bear in mind that BMW will have specified that plug to cope with riding flat out and even Bob's very high temperatures. If you don't ride like that and live some where cool then the hotter plug would be safe enough.

The Iridium plugs would last longer but I never heard of any other improvement over stock plugs in an airhead.  

[Tony Smith]

The correct heat range is BP7ES  but bear in mind that BMW will have specified that plug to cope with riding flat out and even Bob's very high temperatures. If you don't ride like that and live some where cool then the hotter plug would be safe enough.

The Iridium plugs would last longer but I never heard of any other improvement over stock plugs in an airhead.  

Agree ++ And add that I have tried Iridium plugs in several BMWs, at various times over the years and I am yet to see an increase in plug life that justifies the cost (in other words, since the world went to unleaded fuel even ordinary plugs last near forever.
 
And I have never been able to discern an increase in performance after fitting expensive fine wire electrode plugs (other than perhaps a minor increase in acceleration due to a lighter wallet

[marcmax]

Shhhhhh Tony! The marketing folks are doing around 10k in their graves with a revelation like that!

[mrclubike]

You will more than likely foul a plug out way before you ever wear out the electrode.
Just get plain old non resistor copper plugs.
I like Champions N7YC . But NGK's  sure are pretty  

[R65Singh]

I have been using BPR7EIX in my LS and r50/5  for the last year or so.  
There is a noticeable difference in the overall performance in both of my bikes.  The bikes start way easier and runs much smoother.  In my views, this is the best upgrade for the money.
Make sure you use non-resistor spark plugs or take out the resistors of your existing plug caps and replace them with some solid brass cut down bolts (that is what I did).
Also make sure you only buy NGKs and not Autolite.  
Here is a link on Ebay, for $7 a piece you cant go wrong.
http://www.ebay.com/itm/NGK-4055-BPR7EIX-STANDARD-SPARK-PLUG-PACK-OF-1-NEW-/300553868444?hash=item45fa68149c:m:mlB-SIIT85wH5awZQCsftbg&vxp=mtr
Give it a shot, there is very little price difference and you will certainly notice the difference.  
Please report back here, so that others can benefit from your experience.