Quote:
Originally Posted by '16 TT250
Drilled to 117 will not flow the same as a 117 jet. If it works for your engine it's not a problem, but everyone should know that buying a 117 is unlikely to yield the same flow as one drilled to 117.
BTW, it's a jet not jets.
You can't suck all the fuel out of the bowl unless there's a restriction not allowing fuel in, at that point it would bog out and not just hiccup. If the float level is low or there's any restriction in the fuel delivery to the carb there's a possibility that the level could reach a point of being just a hair off between good and not good giving inconsistent mixtures so I'd check them just to be sure. Unlikely to be the air injection. Raising the needle along with a bigger jet might make the mid throttle too rich. Once you determine the proper main jet I suggest doing a mid throttle cruise and reading the plug.
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I don't have a dog in this fight but you are correct. A factory made jet has transition cones to avoid the hard edge that comes with a drilled jet.