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  5. EC LK-138 Tillotson HL Double Stack Up-Pull w/2-Phase Arm Linkage Kit
EC LK-138 Tillotson HL Double Stack Up-Pull w/2-Phase Arm Linkage Kit
LK-138 EC HL Single Stack Up-Pull w/2-Phase Arm Linkage Kit
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EC LK-138 Tillotson HL Double Stack Up-Pull w/2-Phase Arm Linkage Kit

Part Number: LK-138
Online Price: $26.95
EC LK-138 Up-Pull Linkage Kit for Tillotson HL 3-Plate Carburetors
Availability: In Stock.

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Description

EC LK-138 Linkage Kit for Tillotson HL Double Stack Carburetors – Up-Pull Throttle with 2-Phase Arm


The EC LK-138 Linkage Kit is a precision-engineered throttle linkage system designed specifically for Tillotson HL Double Stack (Three-Plate) carburetors. Ideal for high-performance kart racing engines, this kit transforms your carburetor setup with a durable, smooth-operating up-pull throttle linkage. It shares the same robust components as the popular LK-136 kit but includes a specially designed 2-phase throttle arm for enhanced control.


Compatible with:

  • Tillotson HL Double Stack (3-Plate) diaphragm carburetors
  • Commonly used in racing karts and other high-performance small engines


What's Included:

  • LK-90A 90° Throttle Cable Guide
    Precisely guides your 3/16" nylon throttle cable housing (part #300), allowing smooth cable movement and efficient routing in tight engine compartments.
  • EC-139 Billet Throttle Bracket
    Custom-designed to mount directly to the pump stack of Tillotson HL and compatible diaphragm-style carburetors. Securely holds the throttle cable guide in place.
  • LK-131 Billet 2-Phase Throttle Arm
    Clamps securely to the extended throttle shaft, converting your carburetor to an up-pull throttle configuration. Enhances throttle control and adjustability.
  • (2x) 6-32 x 1.5" Socket Cap Screws
    High-strength hardware replaces two of the pump stack bolts. Installation requires a 7/64" Allen wrench/hex key.


Key Difference vs. LK-137:

  • The LK-138 is designed for Double Stack (Three-Plate) Tillotson HL carburetors.
  • The LK-137 is built for Single Stack (Two-Plate) setups.
  • The only difference lies in the length of the mounting hardware.


Why Choose the EC LK-138 Linkage Kit?

  • Built for serious kart racers demanding precision throttle control
  • CNC-machined billet components for long-lasting durability
  • Clean, efficient throttle routing for improved engine bay organization
  • Compatible with popular Tillotson HL series racing carburetors


Upgrade your carburetor with confidence. The EC LK-138 Linkage Kit delivers reliability, smooth throttle action, and race-ready performance—engineered by EC Carburetors for competitive karting.

FAQ

What carburetors is the EC LK-138 Linkage Kit compatible with?

The EC LK-138 is specifically designed for Tillotson HL Double Stack (Three-Plate) diaphragm carburetors, commonly used in high-performance kart racing engines.


What's the difference between the LK-138 and LK-137 kits?

The only difference is the length of the mounting hardware:

  • LK-138 is for Double Stack (3-Plate) carburetors
  • LK-137 is for Single Stack (2-Plate) carburetors


Does this kit convert my carburetor to up-pull throttle operation?

Yes. The included billet 2-phase throttle arm converts your carburetor to an up-pull throttle configuration, improving throttle response and cable routing.


What’s included in the EC LK-138 kit?

  • LK-90A 90° throttle cable guide
  • EC-139 billet throttle bracket
  • LK-131 2-phase billet throttle arm
  • (2x) 6-32 x 1.5" socket cap screws


Do I need special tools to install this kit?

Installation requires only a 7/64" Allen wrench (hex key). No custom tools needed.


Is this linkage kit suitable for racing applications?

Absolutely. This kit is built for competitive kart racing, offering precision throttle control and high durability under demanding conditions.

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