vespa Vnb5t doesnt start.

got pre ignition and platins on right timingpoint. total new ignition from last year

got fuel new carburator.

motor doesnt start anymore , whent for a drive Vespa started schooting and loosing power, got home barely .

checkt ignition and it does not start anymore.

some guy says it can be the oil bearings on the crankschaft .

i dont know what 2 do , had a complete rebuild only the engine sides are old al the rest is already renewd. so i am not eager to open up the engine for nothing.

sorry for my lausy englische hope you guys can help!!!