That technique may work on soft Knobby tires on dirt bike rims, but on other rims with safety beads ... running stiffer, road oriented tires, it's not going to work. (God knows I've tried it!)

21" front tires practically fall off the rim on a dirt bike rim like your KTM. Looked like the soft knobby on there was already broken by the time you'd stopped.

A 17" rear wheel with a knurled safety bead like the DID wheels used on DR650 and other bikes, can be extremely tough to break the bead. Once broken, spooning tire OFF back ON is not the hard part (for me).

The hard part is initially breaking the bead on the stiff rear street tire. I've even seen Tire pros at shops struggle with these using the No Mar tire changer.

With a Coates machine or other power changer, no problem ... but if you get the spoon/breaker bar in wrong, you can break the steel wire bead in the tire ... seen this in person ... luckily it was the worn out tire coming OFF that he ruined. I stopped him right there and got the boss to finish up the job.

On two occasions I've ridden on Flat Avon Distanzia rear 17" tires. One time for over 50 miles. I knew I couldn't break the bead with what I had on board ... and I also knew it would not break from riding flat ... it did not. Caught up with my riding partner who carried a 12" C clamp to break the bead on his 955i Tiger 150/17 rear tire. It worked on my DR's stubborn Distanzia.