1. Home
  2. Clearance
  3. Engine/Parts Clearance Sale
  4. Carburetors Clearance Sale
  5. Tillotson HW-11A Carburetor – 2-Cycle KF2 Avenger Series
Tillotson HW-11A Carburetor – 2-Cycle KF2 Avenger Series
HW-11A Tillotson Avenger Carburetor
Write a Review

Tillotson HW-11A Carburetor – 2-Cycle KF2 Avenger Series

Part Number: HW-11A
On sale: $350.00 $100.00
Phone Order Price:$280.00
You Save:$180.00(64%)
Tillotson HW-11A Carburetor – 2-Cycle KF2 Avenger Series
Availability: In Stock.

Send to:

*We'll ask for shipping info at checkout

Description

Tillotson HW-11A Carburetor – 2-Cycle KF2 Avenger Series | Race-Proven Performance


The Tillotson HW-11A is a high-performance 2-cycle carburetor engineered for KF2 engines and homologated by the CIK-FIA for 2010–2012. This carb helped secure multiple European KF2 Championship titles and is a favorite among elite kart racers worldwide.


This model marked a major innovation in carburetor design, being the first to feature Tillotson’s proprietary Enrichment Circuit, delivering smoother acceleration, enhanced throttle response, and precise fuel metering throughout the powerband.


Key Features:

  • Tillotson Enrichment Circuit – For improved throttle transition and consistent fuel delivery
  • New Venturi & Carb Body Design – Optimized for airflow and atomization
  • Avenger-Class Inlet Needle & Seat – Precision metering under high loads
  • Advanced Acceleration Circuit – Provides better fuel charge under throttle
  • Custom Idle & Acceleration Nozzles – Tuned for KF2 class responsiveness


Recommended Carb Settings (Start Points)

Due to engine variations by manufacturer, date, and configuration, fine-tuning is essential. Start with the most recent recommended setting below, adjusting in 1-minute increments for best performance:

Setting Option

Low (L)

High (H)

Most Recent

1 turn 0 min

1 turn 5 min

Alternate

1 turn 15 min

42 min (0.7 turns)

Note: Adjust high-speed needle first, then low-speed. For extreme conditions (heat, rain, altitude), further adjustments may be necessary.


Technical Specs:

  • Opening Pressure: 0.65 bar
  • Closing Pressure: 0.55 bar
  • Fuel Compatibility: Pump Gasoline
  • Repair/Diaphragm Kits: RK 1 HW, DG 1 HW (Optional: RK 2 HW, DG 2 HW)
  • Compatibility: KF2 Engines (2010–2012 homologation)


Proven on the Track

The HW-11A is more than just a carburetor—it's race-tested technology. It powered back-to-back CIK-FIA European KF2 title wins, proving its reliability and performance under championship conditions.

FAQ

Q1: What engines is the Tillotson HW-11A compatible with?

A: The HW-11A is designed for use on 2-cycle KF2 racing engines. It was homologated for use from 2010 to 2012 by the CIK-FIA and is widely used across European and international karting platforms.


Q2: What makes the HW-11A different from other Tillotson carbs?

A: The HW-11A was the first to feature Tillotson’s enrichment circuit, which dramatically improves throttle response and fuel delivery. It also has optimized needle, nozzle, and venturi designs tailored for KF2 racing applications.


Q3: How should I tune the HW-11A for best performance?

A: Start with the most recent recommended settings:

  • Low Needle (L): 1 turn
  • High Needle (H): 1 turn 5 minutes
    Then fine-tune in 1-minute increments. Conditions like temperature and humidity may affect your final settings.


Q4: What are the opening and closing pressures?

A:

  • Opening pressure: 0.65 bar
  • Closing pressure: 0.55 bar

This ensures responsive operation with consistent fuel delivery at all RPM ranges.


Q5: What fuel should I use?

A: The HW-11A is optimized for use with standard pump gasoline in 2-stroke kart engines. Always mix with high-quality 2T racing oil as per your engine's requirements.

Related Items

Tillotson HL-357B 4-Cycle Methanol Carburetor
$155.79 $60.00 Sale
In Stock.
Tillotson HL-225A Carburetor
$79.00
In Stock.
Tillotson HR-170B Carburetor
$178.50
In Stock.
Tillotson HW-35A Carburetor
$415.00 $270.00 Sale
In Stock.

Recently Viewed Items

Logo