I change lots of motorcycle tires, including TW200 tires--all I ever use is 2 10 inch Motion Pro tire levers, (old ones that I picked up years ago, there's nothing special about them) and all 300+ pounds of me. So far I've never met a bead I couldn't eventually break. Sometimes I put a couple of 4x4's on the floor first and put the wheel on top of them just so that everything sits flat and level and doesn't try to roll out from under your feet. In really bad cases I have resorted to clamping the tire in a big vice or with c-clamps, and in extreme cases I have even used a propane torch to heat things up enough to get the rubber really soft and pliable, just be careful not to burn the rim (or set the tire on fire!). Also, I use silicone spray to lube the tire--I stay away from oil based lubes like WD-40 which will eventually rot the rubber, but silicone based sprays don't seem to hurt the rubber or the wheel and they seem to dry out all right, leastways, I've never seen a seated tire slip on the rim because of silicone spray.
Putting any bike tire back on, I get the first side on, get the tube in place, then put it all on the floor and use the tire levers to get the second side started, then use my knees to hold the tire in place while I work my way around the wheel. This works really well for me, but then, I am a little bigger and heavier than average. I've changed hundreds of tires this way, I usually tell customers that they are welcome to wait if they want to and I'll have their tire changed in a half-hour to 45 minutes, and that's when they bring in a whole bike, not just a wheel. Granted most of the bikes I work on are Honda XR's, Yamaha XT's, TW's, DR's, etc. Dual purpose bikes, no Gold Wings that have been JC Whitney'd to death.