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Old 02-21-2010, 10:03 AM
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Retmachinist Retmachinist is offline
Motorized Bicycle Elite Member
Join Date: Oct 2008
Location: Urbandale Ia
Posts: 637
Default Re: Spark plug gap...Myth? Fact?

I wonder why it is that everyone seems to use a different spark plug gap and they all have a favorite. I spent one afternoon last summer just experimenting with different gaps and test riding two different bikes (I can only do this because I am retired!) I finally settled on .035. Any other gap that I used had an adverse affect. But yet I have seen alot of people swear by .020 or .025. I guess since no two of these Chinese motors are exactly the same it is just what ever works best on your particular set up. Oh, I always use better plugs than the kit plug. N.G.K. or Bosch!

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