Topic: This looks a bit too lean?

[Johnny5]

Would you agree? Bike is running well with no surging through the powerband, but I like to see the insulator a little more tan.

[lrutt]

Unfortunately with ethanol fuel these days you don't get nice tan plugs like you used to. looking down the plug, is the insulator white all the way down or does it darken up somewhere down inside there.

[Johnny5]

I shined a light down the plug and it looks like it's pretty much the same color all the way down.

Unfortunately with ethanol fuel these days you don't get nice tan plugs like you used to. looking down the plug, is the insulator white all the way down or does it darken up somewhere down inside there.

[bomorr]

is that a new plug or one you have had in there a while? wondering because you have the same kind of buildup I am getting around the top edge that I was assuming was oil blow-by

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[flybox1]

Inaccurate/inconclusive test.
You cannot determine WHERE you are lean if those plugs are from general riding through different throttle ranges.
Start over, and do (Part 1) an accurate idle plug chop.
If all plug are white like that one, reuse them.   No blipping of the throttle.  4-5 minutes under a fan.  Check plug color.
Adjust IMS till you get adequate color.  If still lean at end of IMS range(seated to 3 turns out), bigger pilots are needed. 
Start over with idle plug chop/IMS adjsutments till you dial in all carbs.
(Part 2) New plugs.  1/3-1/2 throttle position plug chop.
Adjust needle clip if needed to get desired plug color.
(Part 3) 2/3-3/4 plug chop. 
Adjust main jet to get desired plug color.
Done

[Johnny5]

Sorry, I wasn't more specific. This was a plug chop from WOT. And actually my plug chop from 1/8 to 1/4 throttle was very similar, if not the same. I was starting to work from the mains to the idle, but you're suggesting the opposite, which I'll try. Thanks!

Inaccurate/inconclusive test.
You cannot determine WHERE you are lean if those plugs are from general riding through different throttle ranges.
Start over, and do (Part 1) an accurate idle plug chop.
If all plug are white like that one, reuse them.   No blipping of the throttle.  4-5 minutes under a fan.  Check plug color.
Adjust IMS till you get adequate color.  If still lean at end of IMS range(seated to 3 turns out), bigger pilots are needed. 
Start over with idle plug chop/IMS adjsutments till you dial in all carbs.
(Part 2) New plugs.  1/3-1/2 throttle position plug chop.
Adjust needle clip if needed to get desired plug color.
(Part 3) 2/3-3/4 plug chop. 
Adjust main jet to get desired plug color.
Done

[seanbarney41]

Would you agree? Bike is running well with no surging through the powerband, but I like to see the insulator a little more tan.

I would try one size bigger main jet and decide based on performance....so if you got 110'`s now, try 115's, do another chop, see how it runs, etc.   Best place to do this is the drag strip on test and tune night

[flybox1]

Idle plug chop first as fuel supply is cumulative

[PeWe]

Dyno with air/fuel meter nearby? Measure at idle and step wise up to fully open. I had measured at WOT only with OK values. The way too lean at low throttle was not seen.

I have a Wego III A/F meter to be useed next year, pipe by pipe when I have 4-4. Cyl 2-3 runs leaner than the other. Maybe in need of individual jetting. Carbs were too lean on all, 2-3 got even leaner close to permanent problems. I think that 2-3 always runs leaner due to warmer run due to less cooling than outer cyl 1-4. Easy to make mistake when checking plugs on a hot engine when eaither cyl 1 or 4 is checked, not the wrist/hand burning 2-3.

Wego III has logging to be checked afterwards. A more visual way is to have the gauge beside speedo-tacho meter. An action cam to film the test run that can be viewed afterwards comparing all runs.

Partsforspeed is a good and friendly supplier. I bought the version with longer harness to reach the end of 4-4 pipe where a sniffer pipe is to be placed.
http://www.ebay.com/itm/Daytona-Sensors-WEGO-III-Wideband-Oxygen-Sensor-Air-Fuel-Ratio-Gauge-Motorcycle-/231491968098?vxp=mtr&hash=item35e5ff1c62