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[sportygordy]

I have these pistons in mine and I now get the occasionally sparknock that I never got before. I am careful of what name brand of gas I use but still get it at slower speeds. Maybe there is an adjustment I need to do.

High Compresion will do that and each year our gas blends gets worse and worse... It won't be long until 9:1 will be routine pinger's.

[Zinister]

Does SERT adjust your timing curve? That would solve your pinging I think.

Have you had your bike dyno tuned. If so what were the results?

[HD Street Performance]

The Delphi ECU has ION sensing to pull out timing if it detects pinging but the better approach is not to build in too much compression utilize a tight squish and tune it properly to avoid ping in the first place. The Delphi knock control is a power drainer and erratically can pull too much timing at times.

[Unbalanced]

In the map you have currently in the bike are you sure that the knock sensor is turned ON?   If you do a data gather you can capture when the knock sensor is going on just remember the event has already happened when you see it.

[HD Street Performance]

Good points