Re: what did you do to your motorized bicycle today?
Today I fiddled with the Ruixing carburetor a bit while running the engine without a filter. Wound up with what I believe to be the gas/air screw set at a spot that seemed to make the engine happy. Then, I took it for a ride around the block - good thing that it has pedals & that I managed to adapt that one-piece crank to function with the 4 stroke engine. Still running when I rolled into the drive, but the plug was badly fouled when I pulled it. Out came the wire brush.
I am looking forward to delivery of my angled intake & a plain 2 stroke carb with a choice of jets.