I checked the 2009 DL650 & DL1000. Front wheel part numbers are different & bearings are different. DL650 has a 17mm front axle, DL1000 has a 20mm front axle. Fork internals are also different I believe.
The fork internals, axel, etc shouldn't matter. The only thing that needs to match is the steering head tube to mount the triples. Once those are mounted the fork tubes, axel, wheel are all from a dr650 (or whatever other bike).