My RBS developed a choke problem after I built it, sticking open. Out of part need and part curiosity, I picked up one of the Rally YFA clones on ebay. I figured worst case I can fix the choke on the RBS and stick it back on. I made a new phenolic adapter yesterday and just got her fired up. I need to adapt the linkage and get the choke tube hooked up so I can't drive it yet. But here is a video after a minute of fiddling with the idle mixture and curb speed to get it idling. I didn't open the carb or adjust anything but the curb speed and idle mixture, it sounds pretty healthy. Enjoy.
[bbvideo=640,360]https://youtu.be/dCBCLF76E1w[/bbvideo]
[bbvideo=640,360]https://youtu.be/dCBCLF76E1w[/bbvideo]