HM Spark Plug Cap on CT70's

Discussion in 'Concours Section' started by Dezdan, Dec 9, 2017.

  1. Dezdan

    Dezdan Well-Known Member

    May 17, 2013
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    From what I have seen, NGK was the king of spark plug caps ("noise suppressors"), and most bikes have NGK or unmarked caps from the factory, but I have run across two HM winged caps. Was there a particular year/model that Honda released with the HM caps? Or would they of been all dealer add-ons?
  3. Gary

    Gary Active Member

    Jan 17, 2006
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    I wonder if it's a year thing or is it like the tires,they used what their supplier had? My 50 built in 9-69 has the original NGK cap. My 10-69 70 has the exact same cap but I am the second owner so I cannot be 100% sure it's the original. My '74 TL 125 is an all original bike but I'm at least it's 3rd owner. It has a HM winged cap. That seems odd since the winged logo goes so far back in Honda's history that you'd think the HM would be on the older ones and the NGK on later bikes. What year have you found the HM caps on?

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