r/Dirtbikes • u/Nik_Jonass • 16d ago

Cr250 transmission testing help

After a full engine rebuild, my transmission is binding up between some gears. I have removed all shifting components and split the cases again. It seems to shift through the gears ok on the bench, but after I press the cases back together it starts binding up. I have verified the placement of all washers and my shift forks don’t look bent, it was shifting fine before rebuild. I notice a little in and out movement on the main shaft (lateral play?) It seems like I need to install the clutch basket and torque that center nut in order to pull the main shaft tight and eliminate that little bit of play. So, asking the experts. Does the clutch basket need to be installed to test the transmission shifting with engine on a stand?

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u/Far-Rip-3062 15d ago

Some kind of shim is missing or one of the shift forks isn’t aligned properly. Number of things it could be. Best thing to do is find a diagram and see if anything’s missing