I have a 2001 cr125 and it's missing the complete rear wheel. The only wheel that's an exact fit is the 2000-2002 cr125 wheel. However I did notice that the wheel hub of mine is the same one used on the 2000-2001 cr250 as well as the cr125 and that the only difference between the cr125 rear wheel is the rim size. Would a cr250 wheel mount up and run without a problem on a cr125? I'm pretty sure it will but I'm checking with y'all to be sure.
I would say it will fit, but ive never tried it myself. A 125 tyre is 100/90-19 and a 250 is 110/90-19 so that's only 10mm...I would say it will fit, but ive never tried it myself. A 125 tyre is 100/90-19 and a 250 is 110/90-19 so that's only 10mm total meaning 5mm each side.
I think it will work I just looked up and the swingarm is the exact same for both bikes as well so figment shouldn't be an issue.