Usually it isn't something serious, but finding the cause is the hard part.
I would talk to that shop that sold you the CDI. They obviously didn't know what they were doing when they replaced it, and it was proven when your bike didn't run with it.
I can pull the engine on my Vespa Grande (same design) in 20 minutes, so removing yours for any reason should no longer be an issue with you. People oftem bitch abou having to pull a Vespa engine to service the ignition, but they don't know how easy it really is.
Be sure you put the spacer behind the clutch with the "brim" of the hat against the flywheel.
Jim
Posted on Sep 11, 2003, 6:10 PM from IP address 66.81.24.100