This is what worked for me, your results may vary....
I didn't remove the tank because I didn't have to disconnect anything.
I removed the left controls from the bar and let them hang.
I suspended the brake reservoir and right controls from the ceiling, removed the hardware that holds them on, then removed the clamps that hold the bars on. Then I slid the bars out of the right controls.
I took the stock bars in the house and ran hot water over the left grip. It loosened up and slid right off. While it was still warm, I slid it onto the buckhorns. When it cooled it was tight - no glue needed.
Then I slid the bar into the hanging right controls and reservoir and bolted everything back together.
This is just installing the buckhorns on an '03 TA, no risers or spacers used.
The only adjustment I had to make was to move the throttle cables where they go around the front neck of the frame. They were originally running underneath the big gob of wiring harness there. I positioned them above that big gob and it gave me enough clearance/play so the throttle didn't open when the bars were turned lock to lock. Everything worked fine - maybe slightly tight, but not enough to worry about.
Again, your results may vary.
Oh, it helps to block the front wheel so it can't flop to either side while you're doing this.....
and one other thing, pay attention to the screws you take out of the control assemblies. they are different and won't interchange.