reading spark plug color

[riverex]

How long should you run before you check the plug for color
New plug.

[stupid driver]

you wanna be WOT for at least 10 seconds in 5th gear to get a good reading. Then kill the bike w/out letting off, and coast to a stop. That will get ya a pretty good reading

[02Yellow400]

Check the tech articles there is really good info in there.