Vespa smallframe engine strip down and rebuild. 6. Removing the crank.
To get the crank out of a smallframe - as you'll need to to change
the clutch side oil seal - you need to undo the nut that holds on
the primary drive gear. This is held in place with a tab washer
that will (well should) have been bent up to prevent the nut from
turning inadvertantly. Flatten the washer and use a penny jammed
between the primary drive and the clutch basket gear to prevent
the crank turning while you undo the nut.
There is a woodruff key here too so make sure you keep this safe.
Now remove the gear and begin to knock the crank free. Place a piece
of wood on end of the crankshaft where you have just removed the
primary gear and knock the wood with a hammer to gently push the
With the crank out inspect the crank and the rotary pad for any