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Old 04-10-2011, 02:30 AM
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bairdco bairdco is offline
a guy who makes cool bikes
Join Date: Aug 2009
Location: living the dream in southern california
Posts: 6,257
Default Re: sparkplug gap size

gap's the same. i run my 66 at .030

i've seen instructions saying .036, but that's a little wide.

for experimental purposes, i ran every gap from .010 (barely started) and went .005 increments all the way to .055 (barely ran,) and found it best overall at .030.

between .025 and .035 there was no noticeable difference.

your plug should be a nice cocoa brown color.

light tan or white is too lean and running really hot, while a dark and oily plug is too rich and not burning all the fuel.
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