The standard model has ABS, the R model doesn't.
When you turn the power on from the ignition lock and the dash does the self test thing, it has a number reading on it. This is the length of the trail of the front tire, one full turn. You can adjust this so the odo will record correctly. I am not sure if this has any effect on the speed reading though.
I do not remember if the Adventure does this when you turn the key, and currently am not able to check. A Super Duke does. They have the exact same dash panel, so this would indicate that the functionality is the same.