Last summer I took my '05 ST1300 to a Kawasaki dealer for tires and had them change the differential oil. I didn't get a chance to ride much and then when I did a 200 km ride on a cold morning, I noticed gear oil on the rear wheel. I'm thinking they may have had the bike on the side stand when they filled it and overfilled it. I moved last fall and now can't take it back to the Kawi dealer. I'm concerned the seal may be damaged. Anyone with similar experience? Could it just have been overfilled and will sort itself out or should I check the seal? Better to have the dealer do it or attempt it myself?