Where is your fuel leak? If it is the quick disconnects being plastic and cracked, there was a recall by BMW to replace the male portion with metal. If that is your issue, I would call the dealer and see if they are still honoring that recall for your bike. Give them your VIN and see if it is covered.
If they are not still honoring a safety recall and that is still your issue....
This safety recalls was published in 2004 and included 2000 to 2004 models of many BMW motorcycles using similar plastic quick-connects. At this point in time, I doubt very much the dealer can do much - although in my opinion it should be good for life of vehicle.
FURTHERMORE, the wording of the recall was such they would not replace anything else EXCEPT an o-ring or either connectors (male or female) ONLY IF there was an actual leak in this area. The replacement was not automatic just because someone had the old plastic version of the male/female quick connect.
I can still see this recall on the Canada-Transport recall site, but it does not appear anymore on the NHTSA for the USA - strange ??
P.S.: I just realized the front page of NHTSA were you enter VIN shows the following remarks about 15 years of age limit. Maybe this is the reason the recall from 2004 is not visible anymore.
------- quote from NHTSA-------
What this VIN search tool covers:
Vehicle safety recalls that are incomplete
Vehicle safety recalls conducted over the past 15 calendar years