OK, I found a 130/90-16 dual sport tire. I don't know anything about it other than its size:
http://www.bikebandit.com/tires-tube...tires/t11aa93c
Even better, a Trail Wing in 120/90:
http://www.bikebandit.com/tires-tube...otorcycle-tire
This Kenda says it's OK for front. It's a 90-100/16, so a little narrower than stock:
http://www.americanmototire.com/cata...oducts_id=2636