Keihin MAJ00047 Main/Main Air Jet Series Jets - 393 172

The Keihin MAJ00047 is a precision main/main air jet designed for the 393 series carburetors, featuring a #172 sizing. This OEM-quality jet (part number 9901-393-172) is engineered to deliver precise fuel metering for optimal engine performance and throttle response.

Compatible Carburetor Series:

• Honda VB, VD, and VE series carburetors
• Honda and Kawasaki CV and CVK series carburetors
• Select Honda PD and PE series carburetors
• Keihin FCR carburetors (FCR-D/H, FCR-MX) - functions as main air jet
• Keihin VA, VB, and VD series carburetors

This jet is a critical tuning component that allows riders and mechanics to fine-tune carburetor performance for different altitudes, modifications, and riding conditions. The #172 sizing provides a specific flow rate that affects the air-fuel mixture, making it an essential part for carburetor rebuilds, rejetting, or performance optimization.