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spark plug heat ranges

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15 Mar 2006 00:07 #31263 by rammy
spark plug heat ranges was created by rammy
on an NGK plug the higher the # the hotter the plug or is it just the opposite???
The barn yard;77 Kz650B-1 Kaw(the fun one) & 89 classic hog.
Chicago area-south burbs

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  • Biquetoast
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15 Mar 2006 05:14 #31290 by Biquetoast
Replied by Biquetoast on topic spark plug heat ranges
rammy wrote:

on an NGK plug the higher the # the hotter the plug or is it just the opposite???


It is the opposite. A 9 is a "cooler" plug than a "6".

Through my few years of being here I have noticed that most people seem to run 8's (cooler), with 7's (hotter) being the second most mentioned... for what it's worth...
(1.) '75/'76 KZ400D - Commuter
(2.) '78 KZ750B3 Twin - Commuter
(3.) '78 KZ750B3 Twin - Commuter
(4.) '75 KZ400D - Sold
kz750twins.com

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