Haynes manual plug pics. What color are your insulators?

I was looking at the pics in the haynes manual for xj650-750's and noticed that they say the perfect plugs color is a white insulator with a gray or tan firing tip? I thought that was a lean condition? Mine are white with gray tip and i've been struggling for weeks with this issue. I'm still waiting to get a colortune from charcol?? But don't have one at this point?

 

Check out this link..

http://www.dansmc.com/Spark_Plugs/Spark ... talog.html

 

I noticed the same thing in my manual. Others on this site have explained the factory tune is lean for emissions reasons. If you look in the Haynes it also says not to adjust the idle mixture screws.

In my opinion the manual is a great guide to have but the collective wisdom of this site is the definitive source.

I have been very impressed with the lengths folks on this site go to provide correct and safe instructions.

I got a colortune fro chacal the other day. It's a great tool, my bike is running much better! Good luck.

 

the experts say, #1 & 2 are pretty much on the money.

 

1 and 2 are showing some good coloration around the Insulator.
1 and 2 are within the window of fine-tuning.
They are Lean ... but, NOT "Critically" Lean.

The Mixture of 1 and 2 is an Air~Fuel Mix that will sustain Off-idle and provide enough supplemental Richness for a rapid burn which will be powerful and provide hard acceleration with excellent engine braking.

3 is on the edge of too Lean and only needs to be brought-out and additional two or three DEGREES to match the performance found on 1 and 2.

4 is too Lean. Clean is dangerous. That Pilot Screw needs to be brought out further than the 3-Hole ... erring on the side of Richness to eliminate the clean burn.

A clean burn has too much air in it and is explosively too hot for aluminum parts.
Bring that Screw out and MONITOR its coloration until it matches the other three.

Once you have matched the coloration of one and two with the others ... the Bike will be on the Lean side of high performance.
Steady, hands-off idle
Excellent acceleration
Seamless acceleration from Idle to Wide-Open Throttle.
Immediate Power-on when you are cruising and need the power to pass.
. . . . . . . . . . . . . . . . . . . .

The "Other Side" of the performance window is but a minuscule amount of a tweak to those Pilot Mixture Screws OUT.
Minuscule.
Adding just a touch more Richness.

Ideal setting for Touring and a long-distance ride.
A touch moroe Fuel in the Mix slows-down the burn and makes the Bike run cooler.
Smooth acceleration. Velvety smooth power-on. Throaty, not harsh.
Engine coasting rather than engine braking.
Ideal for a relaxed long distance running.
Good power-on when needed.
Safe.
Cooler running temps and less of a threat to valve, seats and rings if you are going to be cruising along the highway at highway speeds.