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At least one spark plug manufacturer (NGK) recommends a gap of .028" for a 1983 Suzuki GS550 (this is for the D9EA spark plug). Interesting to note, a 1982 Suzuki GS550 uses a different plug (B8ES), and the gap for that one is .032". So if you have a 1983 model, that gap should be .028".

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17y ago

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