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TIllotson HW-10A Throttle Shutter
TIllotson HW-10 Throttle Shutter
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TIllotson HW-10A Throttle Shutter

Part Number: 14A-80
Online Price: $49.99
14A-80 OEM Tillotson 26mm Throttle Shutter for HW-10A
Availability: In Stock.

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Description

14A-80 OEM Tillotson 26mm Throttle Shutter – HW-10A High Performance


The 14A-80 OEM Tillotson Throttle Shutter is a 26mm precision-machined butterfly valve designed specifically for the Tillotson HW-10A high-performance diaphragm carburetor. This throttle plate controls airflow into the venturi, directly impacting throttle response, idle quality, and engine acceleration.


Ideal for 2-cycle and kart racing applications, this throttle shutter ensures optimal performance under extreme racing conditions, where precise airflow management is essential.


Key Features:

  • OEM Tillotson Part #: 14A-80
  • 26mm diameter throttle plate
  • Fits HW-10A high-performance diaphragm carburetors
  • Precision stamped and balanced for smooth throttle operation
  • Hardened screw holes to resist wear during high-RPM use
  • Designed for consistent airflow and superior throttle control


Application:

This throttle shutter is commonly used in high-performance kart racing where throttle response, airflow tuning, and low-end drivability are critical. A worn or bent throttle shutter can lead to inconsistent idle, poor acceleration, and even vacuum leaks—so replacement is recommended during carburetor rebuilds or tuning upgrades.


Fitment:

  • Specifically designed for Tillotson HW-10A
  • May be compatible with similar 26mm venturi carburetors (verify dimensions)


Tech Tip:

Always align the throttle shutter correctly within the bore. Misalignment or overtightening can damage the carburetor body or cause air leaks. Use a blue threadlocker on throttle shutter screws to prevent loosening during vibration-heavy operation.

FAQ

What does the 14A-80 throttle shutter do?

The throttle shutter (also known as a butterfly) controls the airflow entering the carburetor. It directly affects throttle response, idle speed, and fuel metering.


Will this fit other Tillotson carburetors?

This 26mm throttle plate is OEM-designed for the HW-10A model. It may fit other Tillotson HW carbs with a 26mm bore, but we recommend confirming fitment before installation.


What material is the throttle shutter made of?

This is a precision-machined OEM steel throttle plate, built for high-RPM durability and accurate airflow control under racing conditions.


When should I replace the throttle shutter?

Replace if the shutter is bent, worn, or pitted, as this can lead to erratic idle, air leaks, or poor throttle response. Always inspect during carb rebuilds.


Do I need special tools to install it?

No special tools are needed, but use a blue threadlocker on the screws to prevent them from backing out due to vibration. Align it precisely with the throttle bore.


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