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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.
I disagree completely. If the size of the orifice is exactly the same size between two jets the laws of physics mandates they will flow exactly the same volume of fluids. The jet drill size chart above is not my own compilation - it comes from experienced motorcycle tuners and I simply used and applied the info contained therein.
BTW - my reference to 'jets' refers to the fact that I have two TT250's and I needed to drill 2 jets. My command of the English language is sufficiently developed to the extent I am able to distinguish the singular tense from the plural tense.
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