Robbyk,I need to order an exhaust guard for the left side of the bike, sitting on the bike, but I need to know the size of the exhaust pipe right where the center stand rests. Thanks
Get a piece of stiff wire, and bend it into a "C" shape, bigger than the pipe. Bend the "C" open enough to pass the points of the "C" over the pipe, just barely touching on each side of the pipe. Remove the "C" and measure between the points with any ruler or tape measure. That will be the size (diameter) of the pipe.
A dial caliper would be the right tool, really. I have a cheap digital one that measures in Imperial or Metric units.