We had this same type of problem with the Vanagons.  When people take
off the drum and leave the hub still on you'll get this problem if
you're NOT careful with the centering of the Drum.

  If you run the drum Off Center you'll warp it and it's garbage then.
If you center it right away after feeling the Pulsation in the pedal
it's usually OK.

  My $00.02

  Kyle

--

  Kyle Wade  (408) 426-1431 OR  (408) 429-9424
  Keeper of the Volks-Motorsports page
  Home Page - http://www.volks-motorsports.com
  ICQ # 3882975