Home Forums Shifter Karts Is this detonation?

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    • #23983
      Britt Robinson
      Participant

      I took the head off my modified Honda and found that there is heavy pitting on the cylinder body between the bore and the o-ring, and similar conditions on the head. My initial reaction was corrosion from the cooling system. But then I realized it is all contained in the combustion chamber. These are the best photos I have right now…

       

      '13 Velox SK1 - CR125 -
      4th place finisher on a good day @ Tri-City Kart Club, Richland, WA

    • #23985
      Matt Dixon
      Participant

      Yes it is…

      94y

    • #24000
      Greg Lindahl
      Participant

      Very much so.

      Check squish.

      Check fuel quality.

      Check timing.

      Check cc’s.

      Check for anything creating lean condition (air leak/carb settings).

    • #25118
      James O’Brien
      Participant

      Yes, most common reason is timing curve. Unless you have some bad or low octane fuel.

      www.eshifterkart.com

      • #25296
        Britt Robinson
        Participant

        James! I should’ve bought your cylinder and cylinder head when I had the chance. I snoozed AND lost on that one…

        '13 Velox SK1 - CR125 -
        4th place finisher on a good day @ Tri-City Kart Club, Richland, WA

    • #25312
      James O’Brien
      Participant

      There might still be one on eBay Britt if you haven’t figured anything out, It’s a 99 CKT mod. I think he wanted 300.¬†Looked like it was in good shape. I have another, but it’s my championship setup from last year at SRK. So I would want a brick of gold for it ;)

      I’ll be up there Friday to run with you guys.

      www.eshifterkart.com

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