It amazes me that anyone would worry about this.If you take care of it the mileage won't matter.I know I have a 1000 w/24,000 on the odo.It has been at the track quite a few times and I ride the pi$$ out of it and it runs just like it did when I first got it.The maintenance has been done by the book.
My mechanic has a 2000 SV650 with over 175,000 miles (as of last week), original engine. Unfortunately, there is no proof in a photograph because he has had to replace the instrument cluster 3 times--and not in a good way. He used to be a motorcycle courier and now races and runs a repair shop.
I had 214k on my 78 honda hawk. If a motorcycle is taken care of there is no reason it can't get extremely high mileage similar to small cars. One factor besides maintenance is engine stress. I am pretty sure that a 60hp engine pulling something that is 600lbs (add wieght of rider) receives less stress than a 124hp engine pulling a 2400lb car. That is a Saturn estimate btw, and there have been saturns reach teh 1,000k mark. Just my opinion here though