I have used an old Tarno on TD .049/.051, idle down to about 6000 rpm but can't be used with muffler because of SPI. Cox International sell the Cox carb intended for the Cox 050/rc:
http://coxengines.ca/cox-.049-.050-.051-tee-dee-carburetor-assembly.html
Last edited by coriolan; 01-30-2014 at 06:17 PM.