I think this is something like what you are looking for:
http://home.earthlink.net/~johndolsen/id4.html. This version is mounted to
to nose of the van, but the same idea could most likely be adapted to the
rear of the van instead.  The only worry that I would have with the
swing-away hinge style carrier you are describing would be finding a
suitable mounting location that could handle all of the torsional force from
the weight of the scooter when the mount is in the open position.

Hope this helps.
Jay Brown
'85 Zetec Westfalia
'72 Riviera
http://www.geocities.com/vwcamper72

Date: Fri, 14 Mar 2008 10:52:39 -0400

From: barriver witch <barriverwitch@HOTMAIL.COM>

Subject: MotorBike carrier

Hello

Has anyone ever tried or seen anyone build a motorbike carrier for the back=

of a vanagon?? We have a yamaha BW5 (Zuma) We'd like one with a hinge so =

we can still open the back door if needed.....

If not McGiever (my hubbie) is going to weld one up....wish us luck..lol..

=20

Cindy and Alan

80 Vanagon.