Old solutions, but it works
This is an old thread, but I didn't see this $10 solution.
I had a Yamaha Vstar and for synching carbs and other work I followed this trick: you take about 4 feet of 2x8 and drill a 1 inch hole at one end.. Place the 2x8 under the bike with the hole closer to the back of the bike. Insert a 4 foot length of 1" iron pipe (from home depot or whatever) into the hole you drilled. Then "roll" the pipe 90 degrees forward and it should lift the bike an inch or two off the ground. I can't get at my bike right now to check this out, but if there is nothing under the 2-by that will get damaged, you are OK. If a 2x8 isn't enough, go with a 2x10.