Hello, my p150x is all stock with the si20/20 carb. Currently spark is always wet. From low rev to mid, slight purring/misfire but overall not an issue. The big issue is that the Vespa can stop on the road, and when I pull the plug, itís totally wet and sooted, and wonít spark, I would clean on the street and it would spark again. The spark plug is brand new, it did this 3 days ago, so I bought another brand new one hoping it would help but same problem. Spark plug is NGK B7HRS.
I was thinking that the spark plug is too cold and would get a B6? And see how that goes? What about getting the carb to spray less fuel on the plug? How to do this? Thanks