What can be done to make the rear suspension of a Honda 300 4x4 stiffer (i.e. so it does not bounce as much and does not squat as much with a passenger)?

Can anything be done other than a new rear shock?

thanks.

 

other than a new shock shock you can stiffen the preload with a spanner wrench.
If you are the crafty type i know a guy who "gutted " a 300s rear shock an sealed it back up and drilled a zerk in it.he had that set up for a while but i do not know how it will hold up in the long run,but if you have to buy another shock neway y not try it?