spark color

Ok looking at my plugs i the core of the plug is black, and the firing tip is white...what does that mean?

Are they new plugs? Old plugs could be a couple of things.

Mark

Darkangel wrote:

Ok looking at my plugs i the core of the plug is black, and the firing tip is white...what does that mean?

I can only suggest, that you hold the plug wire while cranking the motor for 1 minute. This is the best spark test, known to man, at this time........................Good Luck! and keep us posted.

:laugh: :laugh: :laugh: :laugh:

Mark

Mark Wing wrote:

:laugh: :laugh: :laugh: :laugh:

Mark

Well, it is a test? If it doesn't make you say bad words, then replace everything.

these are all old plugs..the girl ran ok...but I thought maybe lean..

You're right, that is the BEST test.

Mark

Old plugs, I'd say burning oil and lean.

Mark

how do i stop the burning oil part...I just jetting from 120 to 140...so that should stop the lean part

Top end rebuild. What weight oil do you use? You may want to try something heaver.

Mark

Would recommend installing four brand new spark plugs.

Am thinking they are NGKB8ES, but should double-check the factory service manual to be certain.

As for the oil burning diagnosis, would ride it and not worry about it unless exhausting huge clouds of blue smoke.

Just keep an eye on the crankcase oil level.

And read the plugs again after 10~20 miles of highway cruising.

Perhaps the oil residue on the spark plugs results largely from old hard worn valve seals, which is a common non-dangerous condition on these bikes. It's usually worse at initial crank-up of a cold engine after the oil has had a chance to run down into the cylinders, and then burns off fairly quickly after starting the engine.

Actually, the latest most modern spark test is getting someone else to hold the plug caps. Such as perhaps an obnoxious neighbor kid. Or better yet, a bunch of them, holding hands. :laugh:

Good Luck!

Here... This was provided by another member, forget who right now but it was posted... Awesome chart for plug color and explanation what may be occurring in your carb/jet configurations or ignition timing.

OMR

EDIT: Won;t allow attaching pdf files so here's the file in .DOC format (Word)...