With that big of bike you need to make sure the sidecar isn't too light. Get a Ural or something just as heavy.
'78 BMW R100/Ural sidecar, '99 Ural Patrol
'03 BMW R1200CLC Solo & Ural sidecar Rig
'06 Honda Big Ruckus Solo & Sidecar Rig,
'08 Ural Retro, '10 Ural ST Solo