The 600's have a 187kg
total weight load limit on them, which is fine for one person, but i'm about 100kg for instance, then add the always half full large top box and metalwork, possibly 20-25kg, and it leaves me quite limited as to the size of my passengers i can take, about 9 stone max in my case (which is handy
).
I bet a lot of people don't take these weight limits into consideration!