I don’t think That you will find any suspension upgrades for the rear CRV suspension is a coil overs strut sold as a single unit.
What I did was to use a set of Harbor Freight ratchet straps, in addition to the regular tie downs. One end was anchored to the outside ends of the hitch receiver and crossed over to the opposite end of the bike, handle bar or seat area. When they were snugged down, it reduced the bouncing considerably. Basically a 3 point connection to the car (or MH) receiver frame (edit add), instead of the one point receiver draw bar which tends to be a sloppy bouncy connection anyway.
Ken
