Tillotson carburretor HW10A Avenger, for KF3 engines

Venturi Diameter 20mm
Throttle Bore Diameter 26mm
Butterfly Opening
Avenger Class Venturi/Body Design
Avenger Class Inlet Needle and Seat Design
Avenger Class Idle/Acceleration Nozzle Design

Applications:
KF3, CIK Championships

Can also be used to upgrade an HL carburettor with similar size venturi and throttle bores, such as the HL-334A (but check your local rules to make sure the carburettor model number is not mandated).

Can also be used with 4-stroke engines if modified for pulse hole.  

Carburettor Settings:

KF Engines vary  by manufacturer, manufacture date and tuning.  For optimum performance, you might need to try different settings.  Below is a listed of recommended settings, starting with most recent/most popular first.  For best results, start with the most recent and then adjust first the High then the Low needle each in 1 minute increments up to 3-5 minutes each (extreme conditions like hot or rainy weather may require a little more).  If you are not satisfied, repeat the procedure with the next setting.

L=1 Turn 30 minutes; H=32 minutes

L-1 Turn 30 minutes; H=30 minutes