On a motorcycle with a mono-shock rear suspension, there is only one shock that connects the rear swingarm to the motorcycle's frame. Typically this lone shock is in front of the rear wheel, and uses a linkage to connect to the swingarm.
Mono-shocks eliminate torque to the swingarm and provide more consistent handling and braking. They are also easier to adjust, since there's only one shock to adjust, and there is no worry about matching two shocks. Also, the linkages used to connect the shock to the swing-arm are frequently designed to give a rising rate of damping for the rear.
Honda refers to its mono-shock designs as Pro-link suspensions.
- Motorcycle Mechanics Institute,The Complete Guide to Motorcycle Mechanics, 1984, p. 286, Prentice-Hall, Inc., ISBN 0-13-160549-6