I'd go buy a few but I dont have time before this weekend. I have a keihin carb. Any online charts? A buddy of mine says he never bought jets, he just soldered the hole and redrilled it each time.

 

My understanding is that a 165 jet is 1.65 mm. the closest bits you will find would be a #52 which is .0635 in. or 1.61mm which would be equivilent to a 161 jet. Or a #51 drill which is .067 in. or 1.70mm which would be a 170 jet. In other words jet sizes are measured in millimeters. Hence a 100 jet would be 1 mm.drill chart