That is a fantastic absorbing little motor. Love the carburettor. One step up from blowing petrol through a straw - ha! Good luck with getting the transmission sorted.
I would have expected a key of some sort to transfer drive from the gear to the shaft. If not, you could modify it. You could drill through the gear and shaft and insert a pin.
I’ve just been prefiltering for the time being. Need to find something nice and old if I’m going to do something between the tank and the carb.. cheers
As I understand it, there is no differential there, and the sprocket is attached to the axle with something like a collet? But is there really no locking nut or clamp for secure fastening? Is everything really based on friction? Or is this a standard way to reduce impulse loads on the circuit? THANK YOU!!!!!!!!!!!!!!!!!
Using brass for a 'locking shim' is not a good idea as it is a self lubricating metal. Try steel with carborundum paper around 100 - 150 grit tucked in the joint. Regards
The shim was there for a reason and it's moved. It doesn't look like you put the shim back in its place before you tightened it down. Questions would be. Is the shaft original? Why was the shim there? Is the shaft narrower there than the rest of it?