I'm talking about an 80% change in power. As I said it actually stopped at one point, it was very dead feeling trying to blip it.
I had the barrel off when I changed the piston & I decided not to pull the PV as it seemed so smooth through operation. The governor seemed to move ok but can only push a little due to spring. Its bathed in oil so shouldn't be a problem, but can't rule that out, I started to take it apart to check the balls & didn't go any further when it seemed ok.
Interesting that you (Jakobi) had similar symptoms, but maybe not quite. I'll keep it in mind for sure.
I don't think the plug would change that quickly, remember that it runs great most of the time & then Nunnnggg rattle rattle.
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