Well today I bled the rear brake lines.The rear calipers have two bleeder valves on them,so I started first with the left rear lower,and there was a lot of air,then I did the top one and hardly no air in the line. Then I did the right side and very little air top or bottom. Went for a test ride , and now I can lock up the rear tires if needed . I do feel safer with the braking now ,guess the dealer didn't test his work good enough. So I'll hook up the camper next week and ride 400-500 mile to see how it does with it on the back. Again thanks for the info on here ,I know no other forum on trikes with soo much help .