greetings; new to the forum and desparately seeking help....
I just rebuilt my daughters 2004 Vespa ET2. New cylinder, gaskets, piston, rings, carburetor, oil pump belt, drive belt, brakes and brake cables and fuel tap (all plarts bought from scooterpartsco or scooterwest). I degreased everything as well; I DID not open up the crankcase
Compression is at 80 (per haynes manual and forum postings should be ~110?).
Engine will start if I prime it; runs for a few seconds and stops. I validated fuel tap works ie disconnected fuel line, used kick starter, fuel comes out of line.
Ive removed and reinstalled piston, rings, cylinder and head numerous times; no change.
I am truly stumped (I've rebuilt numerous automotive (MG) engines). What am i missing or what hidden thing am i Missing ??
Help truly appreciated