KEIHIN MAJ00004 Main/Main Air Jet - 393 Series #065

The KEIHIN MAJ00004 Main/Main Air Jet is a replacement carburetor component designed for applications using the KEIHIN 393 Series carburetor system. This air jet is identified as size #065 and is intended to support the proper metering of air within the main circuit. Accurate air and fuel metering is essential for consistent carburetor operation, making the correct jet selection important when servicing, tuning, or restoring compatible equipment.
Use the KEIHIN MAJ00004 when replacing a worn, damaged, clogged, or missing main/main air jet. A properly maintained jet can help preserve the intended carburetor calibration and support reliable engine response when matched with the correct application and related carburetor components. Because jet specifications vary by carburetor model and engine setup, confirm that the 393 Series designation and #065 size match the original part or the manufacturer’s application requirements before installation.
This KEIHIN air jet is supplied as one individual replacement component. Inspect the carburetor passages and surrounding components during service, and use appropriate cleaning and installation procedures to help prevent contamination or damage. The KEIHIN MAJ00004 is suited for professional repair, maintenance, and rebuild work where a genuine-specification replacement jet is required for a compatible 393 Series carburetor.

Features:

• Brand: KEIHIN

• Part Number: MAJ00004

• Component Type: Main/main air jet for carburetor service

• Series Compatibility: Designed for use with KEIHIN 393 Series applications

• Jet Size: #065

• Application: Replacement component for compatible carburetor maintenance, repair, and tuning

• Quantity: One individual air jet