Lean? Rich? Not Enough Time?

[Colin]

Hi, I recently did a 50mm BBK on my Tao Tao. It seems to be running good, but I am babying it for break in. I am using a 92 main jet.
How does my plug look? Its been about 15 miles I have ridden on this plug. Do I need to ride longer to tell if I am running rich or lean?

[jwinn]

I'm not too versed on the subject, but it looks exactly like mine i just took out that was gapped at 0.026. Went down to a 0.024 gap.

Also, this may help.

[humanshield]

Take a picture right down into the plugs firing end with a high res camera. Plenty of light. Hard to tell from that photo.
Looks a bit like too much fuel washed the electrode. But even that photo it too small and low res.

Also, Google the term, "Plug Chop".

There's a correct procedure for getting these results.

From the tiny photo you posted, according to the chart posted above, you're running lean.  But again, read up on doing a proper check.

[Colin]

Jul 17, 2018 9:23:37 GMT -5 humanshield said:

Take a picture right down into the plugs firing end with a high res camera. Plenty of light. Hard to tell from that photo.
Looks a bit like too much fuel washed the electrode. But even that photo it too small and low res.

Also, Google the term, "Plug Chop".

There's a correct procedure for getting these results.

From the tiny photo you posted, according to the chart posted above, you're running lean.  But again, read up on doing a proper check.

Its not a tiny photo, click on it and its 3120x4160. But thanks for the info.

[Colin]

Jul 17, 2018 9:15:08 GMT -5 jwinn said:

I'm not too versed on the subject, but it looks exactly like mine i just took out that was gapped at 0.026. Went down to a 0.024 gap.

Also, this may help.

Thanks!

[GrumpyUnk]

You have not run it long enough IMO. To develop deposits, it must be run for a longer period of time. Sure does look clean.
If you view directly 'down the throat' of the center electrode, you should find a deposit ring that indicates the 'heat range' of the plug. The center should be 'clean' down to that ring, and have a little bit of deposit further down.
Get thee to youtube and watch the cycle world Kevin Cameron discussion. He's editor for Cycle World per the verbiage.
tom

[humanshield]

Jul 18, 2018 5:31:02 GMT -5 Colin said:

Jul 17, 2018 9:23:37 GMT -5 humanshield said:

Take a picture right down into the plugs firing end with a high res camera. Plenty of light. Hard to tell from that photo.
Looks a bit like too much fuel washed the electrode. But even that photo it too small and low res.

Also, Google the term, "Plug Chop".

There's a correct procedure for getting these results.

From the tiny photo you posted, according to the chart posted above, you're running lean.  But again, read up on doing a proper check.

Its not a tiny photo, click on it and its 3120x4160. But thanks for the info.

Hmmm....when I clicked on it yesterday it didn't link.  Now it does.  Get a bright light and look down into the plug around the base of the electrode as mentioned.  15 miles should be enough to see something....but it will get easier to see as the miles add up.

The only real danger is running lean.  Especially with that BBK.

[Colin]

Jul 19, 2018 14:38:22 GMT -5 humanshield said:

Jul 18, 2018 5:31:02 GMT -5 Colin said:

Its not a tiny photo, click on it and its 3120x4160. But thanks for the info.

Hmmm....when I clicked on it yesterday it didn't link.  Now it does.  Get a bright light and look down into the plug around the base of the electrode as mentioned.  15 miles should be enough to see something....but it will get easier to see as the miles add up.

The only real danger is running lean.  Especially with that BBK.

Thanks!