I have no idea what will happen on a 'roll your own' bike... The china bike has a tendency to throw the tensioner through the rear wheel now and then. At least it did for a while with me. I have no idea what will happen with your build. I never tried it.
Yeah I'm retired so I am NOT going to ride in the rain. Nothing in this world I need that badly. I haven't moved my car in months so as far as I'm concerned it is motor bike all the way now.
My wife still drives and if I had anything big to get I wait till she is going places near there. I do have to get some bike parts for another bike I am building the chainsaw bike. I will ride the China bike for that since I have not thoroughly tested the 31cc front mount bike yet.
I haven't had the push a thorn into a tire yet, but I mostly ride on city streets for errands. I know one thing If I build another bike I am going to go with a suspension bike next. The potholes here and the uneven repairs are awful.
Anyway keep us posted I'm curious to see how you and racing do with the build. You do know you are likely going to need clutch of some kind, unless you can drag start the engine at every stop sign. I did that with a 25cc engine and it was fine as long as the stop sign didn't leave me with an uphill start.