Me and a friend recently bought a 120Y 2dr wagon. Been sitting for years, fuel turned nasty in the tank, lots of sludge and rust. Previous owners tried starting it, carby filled with rust and gunk and wouldnt start without using ether and wouldn't run. I pulled top of the bowl off and blew out the jets and needle and seat with compressed air. It started and ran for a bit but not for long. We put one of my weber carbies on it, started first go and purred like a kitten.

Try pulling the carby right down (remove every component possible) and clean/replace anything which looks not right, and put it back together. There will most likely be a piece/s of rust jammed in somewhere which the compressed air cant remove.

Also get an oxy-acetylene tip cleaner set and while everything is apart, give all the galleries in the main body a good poking to remove any build-ups

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