Hi folks, I have a vbb motor with pinassco head kit. This project has been a nightmare to say the least, the last two things that I've had to replace just to appease my curiosity was stator plate and the flywheel. I could not remove the old flywheel so I had to cut it off from the crank and in doing so I took a little meat from the crankshaft, so I dunno if this has something to do with it. Upon modifying my own Woodruff key from the local hardware store, they keep shearing in half. Is the material of the Woodruff key the problem or is the size that I'm making allowing there to be too much play causing it to shear? Please any help! Thanks everyone
That taper looks pretty rough. The taper provides most of the holding torque and retaining resistance (to sliding off). The woodruf mostly indexes the relative position between the flywheel and the crankshaft. Boogered tapers will lead to constant failures of the key and keyway.
That crank is toast.
The woodruff key doesn’t hold the flywheel on. The flywheel is held in place by the taper of the crank. The woodruff only locates the flywheel for timing purposes. Grinding off taper has compromised the fit. Sorry, but new crank time.
One thing you might add to your tool kit if you don't own already, a fly wheel puller. It makes the on and off fairly easy and will save a lot of frustration - and dremeling - on the new crank.
Propper key is likely offered with your new crank.
Just out of curiosity - can you fire a picture of the slot side of your crank with the slot in nice focus?
All Content Copyright 2005-2020 by Modern Vespa. All Rights Reserved.
Modern Vespa is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com.