I am used to the grippy brake on my BMW GS. On my terra, I couldn't stop the bike with just the front if my life depended on it. Changed brake fluid, bled many times, replace brake pads, sanded and cleaned the rotor, nothing seems to improve the stopping power. Is this just the way it is on this bike?
You might get better response in this section. Although I have limited time on my Dad's Strada, I thought the front was fine. http://www.cafehusky.com/forums/tr650.28/
The brakes should work better than you described. I would now work backwards and give the master cylinder a refresh and pull the caliper off and give it a good spring clean (ie pull it down) as well. Would like to know how things pan out for you. Good luck