All electronics are from the original engine setup. I believe the cdi has no limiter. It's the blue one with the pig tail and says "new cdi" on the side. Cheap, off ebay.
I tried what looked to be a larger main jet (125) and the buggy acted the same. No measurable speed difference on gps. I did start on my header earlier.
I really don't want to put the header on until I get the engine at least performing as well as the original. Only way to know for sure that the head is the issue is to swap the clutch and variator I guess.