main jet 101 OCTANE 101 for Dellorto carburetor 5mm 042

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Main jet fits 17.5 to 24mm Dellorto carbs and their replicas. To tune the carburetor to always install a large jet. At full throttle, the engine should then start to stutter (4 bars). Now you have the main jet nozzle down in increments of 5 until the engine is running smoothly. Caution is too small main jet emaciates the mixture, this can lead to cold seizures. Main thread of the nozzle = M5.
Appropriate sizes, please select from the list below.

5mm 042