I know this thread is a little old, but if you are still interested I have a 2000 LC4 640 Dualsport with one month old Pirelli MT21 front 90/90/21 and rear 140/80/18 tires on it. I bought these tires to go off roading and haven't had any time. Problem is these are my only wheels so I would like to get rid of them since my bike is basically set up for the dirt and I am riding in the street. These tires are listed as the most agressive street tire available they say 90%off road and 10% on.I am looking for 17" wheels, so if you are still interested let me know. I can email pics.