My technique to change a tire

[JDM]

I set the Connie center stand on a 2"x 6"x 3' long board centered crosswise under the bike. The board has two eye bolts - one on each end. I then tie the handle bars to the eye bolts this secures the bike from tipping over and keeps the bike from rolling off the center stand while tugging on the tires. I also use a 1" x 6" x 12" long board up against the underside of the front of the engine, which spreads out the loads so I don't have to remove the plastic belly pan, and use a small bottle jack to pick up the front of the bike so the tire can clear the finder. This works for front or back. This approach makes it very easy to re-install the tire as you can tweak the jack up or down to the right height to install the spindle bolt without wrestling with the tire height while re-stabbing the bolt. And, as I stated before, you don't need to worry about the bike rolling off the center stand which would ruin your day! 
I set one foot of the center stand on a 2x6 by rocking it over to one side and use the heal or toe of my boot to slide it under one foot. Then I rock it the other way and use the heal or toe of my boot to maneuver the board under the other foot.  I then tie it down and proceed as described above. When you are finished you can get on the bike and shove it forward off the center stand. HTH JD

JD
P.S. You may have to use a thicker board under the center stand as my bike has been lowered, but you get the idea.       
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[Summit670]

Good idea. 

I've used a few square steel tubes under the middle of the centerstand to raise the front wheel up by tying off at the grab bars, but the tubes were inserted under the centerstand from the rear, and the rear end of the tubes were about straight below the grab bars.

[nevadazx12]

What I have done to get the bike high enough to remove the rear tire is use a 2 x 4 cut on the diagonal to form a wedge on the wide portion.  I rock the bike to one side on the stand, slip one in about halfway, then go to the other side and rock it in the other direction and slip the other one in until I reach the flat. Then go to the other side again and rock it and finish pushing it on to the flat portion.  Works best if you are parallel to the tires if you try going toward the center the noses will hit.  Gets the bike up another 1 1/2"  beats a hernia and it clears the stock fender.

[SteveJ.]

I just bobbed the fender.

[Cholla]

I just remove the bevel drive unit and the tire comes right out. Now you cam grease the driveshaft/bevel drive splines and coupling. Needs to be done regularly, so do it when ya change the tar.

[Roadhound]

I just remove the bevel drive unit and the tire comes right out. Now you cam grease the driveshaft/bevel drive splines and coupling. Needs to be done regularly, so do it when ya change the tar.

exactly, that's the procedure that's always worked for me.

[jim-d]

I use the board method with a twist.  3 pieces of 2x4.  One for front & back tires & one for kickstand.  Drive bike up onto 2 boards, put kickstand on 3rd.  Then slide kickstand board under bike.  Goes up like its on level ground.