Here's the only view I have of a C's sub-frame. You'll have to blow it up to see it.
'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