Rake is the same as caster which is the automotive term. Rake or caster sets trail which will determine straight line performance along with cornering effort. As with all things there is a compromise. The important thing to remember is that Rake is the steering axis angle not the fork tube angle so when trikers install a "rake kit" the rake is not changed so that term is incorrect. offset triple trees change the fork tube angle which does change the trail and camber gain but does not alter the rake. That requires a torch and welder.
Normal trail on a motorcycle is approximately 6 inches on cars and reverse trikes is under 3/4" in general.
"Take the Right Turn"