I always had oil traces underneath the kick shaft and it was hard to distinguish between engine oil and chain lube. As oil consumption was very low, 0,1-0,2L/3000kms, so I only monitored that.
After 15´kms within the purpose of maintenace the seal was replaced. In fact the place under the shaft is almost totally dry since then, meaning that the original seal never was really tight. Apparantly the oil only drips when the engine is running, so I never saw any puddles in my garage. The amount, however, is quite small and neglectible and the seal certainly is not prone to break suddenly, shutting down the bike. So tell your dealer to replace it shortly before your warranty is over. Regards