Not sure about your Moto Trike, but my Road Smith has a screw adjustment to tighten the parking brake cable, just peel back the cover, an easy adjustment. I got the parking brake as an option and find I don't need it. Park the thing in first gear, it has never moved on me. One word of caution, do over tighten the cable, could put pressure on the brake pads and over heat the rotor and or rotors, that is not good. My parking brake only operates on the right side rear wheel.