you can send your rear shock to get revalved and resprung for your riding style and weight, and like Bones said get a set of progressive front springs and use a heavier wieght oil and that should bring it up to par, trikes have alot less sprung weight than a quad and setup right can get crazy like a dirtbike through the rough stuff, Im sending my flat track atc250r to
www.fcrsuspension.com to get completely redone for racing for me.