Doc if it's not too late & you've already ordered them then I've had this information on record for a while now.

Steering head (DL650 & DL1000 all years):
Size: 30x55x17mm - 2 needed
Suzuki #: 09267-30010
Common #: None
Seal #: 51644-12C00 - 2 needed
The OEM steering ball bearings may be replaced by tapered roller bearings no. 32006 (2 pcs.), if you wish to go this way.
You will pay a bit more than Rixingtons suggestion if you go with a 'named' make like KOYO, SKF or Timken but they will last.
