From:Doug Strange e-mail:AMCAdoug@aol.com
Subject:RE: Sparks plugs Date:Sat Feb 27 13:26:29 2016
Response to:6097
I'm running Champion D16's in my 1931 KJ. Those are hot plugs
but the bike runs great on them.

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Can anybody out there tell me what spark plug and heat range
came in a 1930 KJ and in a 30 superx from the factory and a
picture would be helpful thank you