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Throttle Shaft Kit for Honda GX200 & Clone Stock Carburetors
168F-55 GX200 Clone Throttle Shaft Kit
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Throttle Shaft Kit for Honda GX200 & Clone Stock Carburetors

Part Number: 168F-55
Online Price: $3.25
Throttle Shaft Rebuild Kit – Fits GX200, Clone & Predator 212 Carburetors
Availability: In Stock.

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Description

Throttle Shaft Kit for Honda GX200 & Clone Stock Carburetors


Restore precision throttle control with this Throttle Shaft Kit, designed for Honda GX200 and clone-style stock carburetors. This complete kit includes everything needed to replace or rebuild the throttle shaft assembly—critical for both reliable operation and racing compliance.


Whether you're maintaining a stock engine or blueprinting for competitive racing, this kit gives you the OEM-spec components needed for consistent airflow and throttle response.


Kit Includes:

  • Throttle Shaft
  • Throttle Valve/Shutter (Butterfly)
  • Throttle Valve Screw


Pro Tip from Engine Builders:

For improved low-speed signal or smoother throttle transition, many engine blueprinters lightly sand the throttle stop or throttle shaft lever to fine-tune butterfly alignment. Always check class rules before modifying.


Compatible with Clone Carburetors:

  • Tillotson PK-1
  • Huayi
  • Ruixing
  • SP Clone-Style Carburetors


Fits Small Block Engines:

  • Honda GX200 / Clone (196cc)
  • Box Stock Project 196
  • Tillotson 196 / 212
  • Ducar 196 / 212 / 224
  • Predator 212 (Hemi & Non-Hemi)
  • Predator 224 Non-Hemi
  • Wildcat 223


Racing Tech Specs & Rule Compliance:

AKRA 2020 Rules for Throttle Butterfly Screw

Butterfly .037-inch thickness. Butterfly screw minimum length .305-inch, the screw must remain stock as produced with no alteration allowed to achieve min length.


AKRA 2020 Rules for Throttle Shaft

Throttle Shaft .115-inch minimum thickness. Stop arm of the throttle shaft may be filed to adjust the butterfly position.


NKA 2020 Rules for Throttle Butterfly Screw

40.4.11.6: Butterfly 

The butterfly is .037-inch min thickness; butterfly screws minimum length 0.305-inch. 


NKA 2020 Rules for Throttle Shaft

40.4.11.5: Throttle Shaft 

The throttle shaft is .115-inch minimum thickness; the material is non-tech. 



Ideal for:

  • Engine rebuilds
  • Stock kart racing
  • Clone carb tuning
  • Blueprinting to class rules

FAQ

Q1: What does the throttle shaft do in a carburetor?

A: The throttle shaft controls the movement of the throttle valve (butterfly) inside the carburetor. It regulates airflow into the engine, affecting acceleration, idle speed, and engine responsiveness. A worn or damaged shaft can cause inconsistent throttle performance or air leaks.


Q2: What’s included in this throttle shaft kit?

A: The kit includes:

  • 1x Plastic throttle shaft
  • 1x Steel throttle valve (butterfly)
  • 1x Throttle valve screw

This kit provides all the necessary components to rebuild the throttle system in a stock-style clone carburetor.


Q3: What carburetors does this fit?

A: This kit fits most clone carburetors including:

  • Tillotson PK-1
  • Huayi
  • Ruixing
  • SP clone carburetors commonly found on GX200/Clone engines


Q4: Which engines are compatible with this kit?

A: This kit fits a wide range of small engines, including:

  • Honda GX200 and 196cc clones
  • Tillotson 196 / 212
  • Ducar 196 / 212 / 224
  • Predator 212 (Hemi and Non-Hemi)
  • Predator 224 Non-Hemi
  • Wildcat 223


Q5: Is this throttle shaft kit legal for kart racing?

A: Yes, this kit meets most Box Stock class regulations. Both AKRA and NKA rules specify:

  • Throttle shaft: minimum .115" thickness
  • Butterfly screw: minimum .305" length
  • Butterfly: minimum .037" thickness

Check your rulebook before competing to ensure compliance.


Q6: Do I need to modify anything for installation?

A: In most cases, no modifications are necessary. However, some builders lightly sand the throttle stop or plastic shaft lever to align the butterfly perfectly for optimal air/fuel flow. Always verify class legality before performing any modifications.


Q7: How do I know if my throttle shaft needs replacing?

A: Common signs include:

  • Sticky or unresponsive throttle
  • Air leaks at the shaft location
  • Inconsistent idle
  • Excessive shaft play or visible wear

Replacing a worn throttle shaft improves throttle accuracy and engine performance.

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