what spark plugs do you use?

[powerram50]

the bpr6es ngk's cost me less than 2 bucks each.it started easier this morning,warmed up faster,idled better and just ran better.i have never liked auto lite myself.champions are probaly my second choice.

[lakecountrydave]

My bike is stock. I installed NGK plugs. I clicked resistor plugs as I believe that is what they are, but I don actually know that to be true.

NGK BP-6ES (NGK 7333)
Gap 0.71 mm

[Crazcnuk]

BP6ES is not a resistor plug.

BPR6ES is the resistor version of the same plug.

[lakecountrydave]

Then I voted incorrectly. Sorry!

[Geezer]

BTW, don't use split-fire plugs unless you like holes in the tops of your pistons. There was a bad idea that's time should have never come.

Geezer

[Crazcnuk]

Not sure why split-fire would make any difference at all, especially to your pistons.

Having a split electrode only looks good in the ads, but since the spark will only go one way at a time, having two really does nothing at all.

[Montreux_Blue]

Originally posted by Crazcnuk
Not sure why split-fire would make any difference at all, especially to your pistons.

Having a split electrode only looks good in the ads, but since the spark will only go one way at a time, having two really does nothing at all.

It just going to find the path of least resistance, no difference in performance that I could see them doing. And Autolite plugs are not made in America anymore, made in China. Their quality control has left the building! Check the box when you buy them, you might get lucky and get the American made Autolites! Almost forgot, I'm looking for the NGK iridiums locally right now, may have to order them. I think it's got Autolites right now.

[Montreux_Blue]

Does anyone have the part number for NGK iridium plugs? Nobody can seem to cross reference the NGK BP6ES to find them. Is it maybe the BPR7EIX or BPR8EIX?

[dbeardslee]

NGK has a nice little parts finder on their site . I did a search on XS 1100 and they say what you want in iridium is the BPR6EIX. Also, be thee aware, NGK numbers their plugs bass ackwards. The higher the number, the lower the heat range.

[wa407mpp]

I've used NGK's on all my bikes for years and wouldn't use anything else. I change them every spring and keep the old sets for emergencies, one set in my fairing for any on the road problems. I've never had to use one, but I have given some to other riders who were broke down at the side of the road.

[Crazcnuk]

BPR6EIX

BP6EIX


Ideally you want them with out the 'R'. The R is for resistor and our bikes don't call for a resistor plug.

Everywhere you go, though, NGK specs a resistor type to replace the non-resistor plug.

BP6EIX-8 would be pregapped to .032

You could also use the BCP6EIX or BCP6EIX-8 These are the same as stock but use a 5/8" spark plug wrench instead of the 13/16". Not sure if that would make any difference.

Here is an NGK chart, unfortunately it doesn't show iridium under the normal plugs.

http://www.cr-x.org/home/plugs/partnumberkey.pdf

[wa407mpp]

The"R" is a must for the guys who run a radio or other electrical equipment.

[Pat Kelly]

I currently am running NGK in both my XS,s.
I used Bosch Platinums in the E when I installed the Dyna coils. Worked well.
When I was roadracing I used ND plugs because ND rep gave them away free.
Years ago when I worked in auto parts, we hooked an ohm meter to different brands of plugs. All the plugs were cross-referenced to be equivilent. Autolite had the least resistance, Champion had the most. The others in the middle were AC, Bosch, and another that I don't remember.

[Crazcnuk]

"The"R" is a must for the guys who run a radio or other electrical equipment"

Not on the XS, unless the plug boots have been changed.

The XS has 5Kohm resistor boots on the plug wires to get rid of the RF interfrence.

[DavesXS]

Originally posted by Montreux_Blue
Does anyone have the part number for NGK iridium plugs? Nobody can seem to cross reference the NGK BP6ES to find them. Is it maybe the BPR7EIX or BPR8EIX?

It's the BPR6EIX for the NGK iridiums.

Edit: I wouldn't worrie about analyzing the R factor. Iridiums out perform any other plug you can possibly get.
Iridiums are 100k mile plugs. I have yet to see one foul out. They should last in our bikes the same time as 5 sets of regular. Maybe the last set you ever buy.