Won't hurt the bike. Use 2nd gear to bump start it. One caution, it is best to know why your battery went dead.
If it because the stator fried, it may not start and if it does it will be running off of the battery. Same thing if the voltage regulator is dead, and if the voltage regulator is over charging, it could be what fried the battery.
If it because the stator fried, it may not start and if it does it will be running off of the battery. Same thing if the voltage regulator is dead, and if the voltage regulator is over charging, it could be what fried the battery.