I'm repairing a carb and the part (screw?) which goes in here broke, and I'm struggling to find a replacement as I'm not sure what to search for! What's it called?
As shown in the picture it's a round entrance but then goes into a smaller rectangle hole.
It's purpose is to poke out inside of the throttle tube and keep the throttle plastic riser part straight. Otherwise the throttle riser doesn't go down as it's blocked by the idle screw. I'm guessing based on the shape of the hole that the part which sticks out is rectangular.
All that's written on the carb is a TK logo, and F28-720000-11-W1401 5A05 1. It's off a 2015 Sinnis SP125 motorcycle, otherwise known as a Sinnis JS 125-7F.