Due to a great demand for SSI main jets and the limited availability we had them made. These precision UN-DRILLED jets blanks are American made by RJL industries, a leader in Aircraft parts for over 40 years. These UN-DRILLEDjets can be drilled to any size by the buyer and are great for tuning and vintage racers. Jet sizes are in Metric but easily converted to fractional sizes. A #100 jet is 1mm in size, a #140 jet is 1.40mm, a #160 jet is 1.6mm in size. To use fractional drills multiply the jet size by .039" A # 100 jet uses a .039" drill, A # 125 Jet uses a .048" drill. Jets fit SSI carbs 18-35mm and do not fit the larger bodied 36-42mm carbs.
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