plug failure

[kmm0000]

I had a spark plug failure on my 2004 1200.

The front plug failed.

The plugs only had about 600 miles on them as I changed them last oil change.

I guess that is what I get for using "Champ-Pee-On" plugs.

I will be sticking with NGK from now on.

[OldFenderGuy]

Strange...

I run the Champion 810's (RA8HC) frequently and haven't had any problems.

:dunno

In fact, I put in a set of them at the last oil/filter change, about 1,100 miles ago, and just checked them out a couple of days ago. Good 'color' on both the front and back, and the 2005 1200C is running perfect at all RPM ranges.

[IronMick]

I had a spark plug failure on my 2004 1200 ...
What tests did you do to determine that it failed?

[kmm0000]

I could hear that it is not firing + header was stone cold).

Checked the boot connections at the plug and coil, no luck.

Replaced it with another plug, the bike ran as normal.

Just to check it, i put the bad plug into the bike, once again it was not firing.

[cantolina]

I had a spark plug failure on my 2004 1200.

The front plug failed.

The plugs only had about 600 miles on them as I changed them last oil change.

I guess that is what I get for using "Champ-Pee-On" plugs.

I will be sticking with NGK from now on.

Plugs don't fail engines....engines foul plugs.....

Is it better that you get the mileage from an expensive plug that I get from a 1.50 Autolite?

:dunno

[kmm0000]

The plug didn't appear fouled, it just wasn't firing. Hence the term "failed" not "fouled".

Champions are about the cheapest plugs around, as the saying goes, you get what you pay for.

BTW - Didn't know NGK was an "expensive plug".

[Takingabreak]

The plug didn't appear fouled, it just wasn't firing. Hence the term "failed" not "fouled".

Champions are about the cheapest plugs around, as the saying goes, you get what you pay for.

BTW - Didn't know NGK was an "expensive plug".

NGK are not that spendy, but they are a premium plug.\I would be careful here, I love NGK's, but have had 0 luck running them in the sportster, neither my 1998 or my 2003.
They seem to be more sensitive to fouling out. I have not tried the Iridium's, but then again, them there is the expensive ones.

BTW, Harley's plugs are made for them by, Guess who, Champion.

It's not that Champions are cheap, they have the easiest to break Isolators.
Look at your plus again(A Magnifying glass will help) and look over the insulator for a hairline crack.
If you can't find one, use an Ohm meter to test it for and open resister.
if it all checks, look for a glassy coating on the tip. If that is the case, you have to look for the root cause, as you will have a problem again.
this is usually caused by oil or a gas additive that has silicon in it.

[Turbota]

If you want a good plug that costs about $1.60 each, get a set of Champion RA8HC.

Gap them to .040"

Works like charm ... Mine have never fouled or missed a beat right up to 7,000 revs.

[Jimbo999]

I had a Harley plug that the whole center section ( whatever that is ) come
lose. Pulled right out with the wire still attached.
That's the last set I bought of them.

NGK for me since then and I like them...Even saw a little performance gain.

[stevo]

any plug can fail....

I've had brand new plugs that didn't pass spec when I used to race cars...

Personally I wont run Champions on later model vehicles as I've had too many fail over the years...

They're good on the old iron stuff tho...

Both myself in my shop and my mate in his HD shop run nuthin but NGK's and rarely have we had a problem..and we go thru boxes of 'em a week due to the amount of bikes we're servicing...

although Ducatis are hard on plugs and if ya go 1 heat range too cold they will often fail within a couple of thousand kays.....but that's blooody Ducatis for ya..