OK: I know this 650R dual sport stuff get beaten to death but I've done a search and haven't found a lot of maintenance info yet. What is the required maintenance for a 650R used on the road? Are you having to change oil every three, 30 km rides to work? I'm used to the street bike 3-4000 km oil changes and tires every 10,000 kms. What does the BRP REALLY cost to run in DS mode? thanks..