Join Date: Apr 2006
Location: Olympia, Washington, USA
I've ridden two up with no problem, I guess the size of the companion could matter. The ST4 (916) is a blast to ride, I don't know what I would do with more ponies, and I don't believe that you give up many ponies to the larger brethren. I would look at the other factors.
1978 BMW R100/7
2001 Ducati ST4