sparkplug color??

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65fury

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Well im still trying to get my bike tuned... but no luck, and on top of trying to tune it i dont even know if im running rich or lean??? my plugs are grey... not tan or white... just grey. Almost like they look when new... why?

jason
 
You want to look in two locations for proper plug color. 1st look at the rim on the plug, this color with indicate the slow speed air/fuel. 2nd look at the color of the porcelain located in the center base of the plug, this will indicate the air/fuel of the mid~high rpm range. If every thing is gray in color then I would think you are very close to a proper tune.
 
Here is what a good plug looks like. Your going to want a light tan.

sparkplugreadingsproper.jpg


More info:
http://www.wallaceracing.com/plug-reading-lm.html

readingsparkplugs.jpg
 
Wow i didnt know a sparkplug could tell you so much... well mines like this, the base ring is BLACK and the strap is grey, i never noticed the porcelian color. ill check tomarrow. thanks

jason
 

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