Vespa Bravo 49cc motor bicycle

[frankk]

Anybody on the forum have experience with one of these? Its been sitting in my tool shed for at least 25 years and now its time to pass it on to the grandkids. Before I started I flushed the tank, cleaned and set the points, disassembled and cleaned the carb and installed a new plug. one day it runs crappy and the next day it runs really crappy. Doesn't want to throttle up much past an idle, is hard to start and eventually it dies on its own when idleing. It has one of those decompression valves on the cylinder head to stop the engine. Anybody have ideas that could help? Frank