If all you got was the mirrors you'd have to move the grips and controls up on the handlebars to fit the CRG's. You need to get the little adaptors that mount inside the end of the handlebars that give the CRG's something to clamp on to...
CRG adaptors.
The adaptors use an expansion bolt-type clamp to clamp inside the handlebar, and the end of the adaptor is sized so the CRG's bolt right on. Bonus is that you don't lose any handlebar width and resulting leverage on the steering.
Once you have those things installation is really simple. Unless you can move the grips/controls around.
The CRG's rock... usable mirrors, what a concept!!