bumpa.
am in the middle of a full refresh on my cb350f and tonight i was installing all the rear brake hardware, including the brake stay and brake rod. on disassembly i noted the brake rod connector pin can't be removed (or installed) unless the shocks are disconnected and the swingarm is raised fully and the tire contacts the underside of the frame. the cotter pin hole is on the outside, opposite the swingarm.
this means that when installed properly, the brake rod connector pin is trapped and can't back out even if the cotter pin fails. this designed-in safety feature makes sense to me, and thought i'd pass it along. might be cb350f only, no idea. might be worth a look tho.