thx i realize the bearing is two parts a washer and bearing listed as one in diagram. so think its right. i did have it slip off the spacer before maybe it did it again. im gonna have to check.

im working on a xs650 clutch too but thank god its doing ok. they are a little different in where the bearing goes.

the mx250 clutch looks like a dt1 250 one in washer sequence

imgur.com/a/qnoGyLa
got clutch to work right after removing this gear to the left of clutch that tied into basket gear. for some reason the gear seems a little wobbly like it needs a different washer or extra washer on back to help clear the race bearing. anyone know what washer goes behind this or if theres three washers total? thx

got a kick diagram finnaly. looks like gear is 29 and im missing a 28 washer.  it s wave washer 2 dollars plus shipping n tax.  

Those gears do get floppy & wear as they sit on the shaft but missing a washer or not isn't going to affect the clutch operation. Unless i'm missing the point of what you're saying sorry.

yeah your right it wasnt the washer. i must of just put the bearing in right when i had the idle gear off. i had a time with it again but finally got it working. it would bind when i would crank the nut tight. now im waiting on a friend to weld a clutch tool since i couldnt find one online for the 250. i got some clutch plyers but afraid a tool might be better as i dont wanta damage the clutch boss when i torque her. its a celebration now i got it right!
oh yeah i put a idle gear in that has a bunch of cut out holes because that was in the manual.  do yall think the solid gear is better?  i feel like ones lighter but will the hole one take in gunk and be unbalanced?  or will it break easier?  i feel like i didnt need to change this but i did.

The one with holes might be from a YZ from a similar year to your bike. Just yamaha's way of saving weight any way they can. If it fits & has the same teeth count it'll do the same job. Your choice but nothing to gain on a trail bike.