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Could anyone please tell me the correct spark plug reach for my 1986 stock aluminum head roadster? Is it .750? I know the gap is .035. I want to make sure I get the correct plugs. Thanks
TJ, he means "off the shelf, always in stock, what trhe doctor ordered."
the specified plug, per parts books. mine is alum hd 91, .750, not sure about other heads.
if you simply want the correct plug, order the AC that your user manual calls for and forget about the reach. or order whatever the auto store specifies. the reach will be correct if engine has stock heads, right?
joe