Holley Carburetor Standard Main Jet, 1/4-32 Thread, .101" Jet size

Holley Standard Main Jet - Part #122-86

Fine-tune your Holley carburetor's fuel delivery with this precision-engineered .101" main jet. Each jet is flow-tested and stamped with its exact flow rating, ensuring accurate and repeatable tuning results. The 1/4-32 thread design fits all standard Holley metering blocks for easy jet changes during carburetor tuning.

Key Features:

• Precision Orifice: .101" jet size for controlled fuel metering
• Flow Tested: Each jet individually tested and stamped with flow rating
• Standard Thread: 1/4-32 thread fits all Holley metering blocks
• Genuine Holley Quality: OEM-grade brass construction
• Tuning Essential: Changeable for precise air/fuel ratio optimization
• Consistent Manufacturing: Precise entry/exit geometry for repeatable flow

Performance Benefits:

• Controls main fuel circuit flow for precise air/fuel ratio tuning
• Flow-tested design ensures consistent, repeatable results
• Easy to change for quick tuning adjustments at the track or dyno
• Precision orifice sizing eliminates guesswork in carburetor tuning
• Optimizes engine performance across the RPM range

Understanding Main Jets:

• Function: Controls fuel flow from the fuel bowl into the main metering system
• Flow Rating: Measured in cubic centimeters per minute (cc/min)
• Tuning Impact: Larger jets = richer mixture; smaller jets = leaner mixture
• Entry/Exit Design: Precise geometry affects flow characteristics and tuning response
• Stamped Rating: Each jet marked with its exact flow number for easy identification

Ideal Applications:

• Carburetor tuning and optimization
• Dyno tuning sessions requiring precise fuel metering
• Track tuning for changing conditions (altitude, temperature, humidity)
• Engine modifications requiring fuel delivery adjustments
• Replacing worn or damaged main jets
• Building a jet assortment for comprehensive tuning capability

Tuning Tips:

• Start with baseline jetting and make small changes (2-4 jet sizes at a time)
• Monitor spark plugs, air/fuel ratio, and performance for tuning feedback
• Altitude changes typically require leaner jetting (smaller jets)
• Temperature increases may require richer jetting (larger jets)
• Keep a selection of jets for different conditions and tuning needs

Technical Specifications:

• Part Number: 122-86
• Jet Size: .101 inches
• Thread Size: 1/4-32 (standard Holley)
• Type: Standard main jet
• Material: Brass
• Quality Control: Flow tested and stamped
• Compatibility: All Holley carburetors with standard metering blocks

Fast dispatch from our Perth warehouse. In-store pickup available for local customers.