I read about this on Eric Gorr's website, or in his book- I don't remember. But, I know it was a common mod for cr125 to go with the rm125 piston, only the squish clearance had to be adjusted to run with the suzuki piston. You will now need to run the rm 125 piston in your bike, because the head clearance has been changed to run on the suzuki piston-I presume. I read this info in 2000-2001 so I would believe a piston for the rm125 2000 should be just right. I know the cr125 piston was the same from 1992 up til recently, but you're not gonna need the cr piston anyway. I'll get back to you on the advantages of the rm setup in your bike.