Posted 06-29-2020 at 14:56:13 [URL] [DELETE]
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Sellers almost always go by part numbers....such is life. I already told you of Gary's experience with one company who he has used extensively and found proper correlation between part numbers and jet sizes.
In closing, you are very, very likely looking in the wrong place for your problem.. REMEMBER, the power adjust needle has the final say, not the Main jet! TSX 580 didn't even have a main jet....simply relied on power adjust needle.