Can you I.D. this crank ?

Found this in my parts box , I think it may be a early to mid 70's 250 not sure tho. I'm thinking of selling off some parts that I will never use and some one may need this.

I.D. of top of rod is .850th = 21mm
eye to eye 4"and 15/16 =125mm
Ign. side .984 =25mm
clutch side on raised lip 1.102 =28mm

I hope I got the cross reference right to mm .

By the size of the flywheel I would guess at 72-74 big case 250 seeing the big end is not close enough to the OD of the crank cheek to be for a 400 or 450

Any other info needed for I.D. ing this thing ?

Maybe a shop manual for verification purposes. The crank bearing journal measurements you gave are very common with engines going into the 80's

The pin location in the flywheels doe not look like 80s cranks to me in pics

It was in my 79 wr 250 and the piston was about 3/8ths from the top of the cyl. so the rod is shorter than a 79 250.

that or the rod is the same and the cheeks are different?

So definitely an earlier crank than 1979 with a 125mm center to center on the rod. Rod length does not affect stroke but does affect stack height

I did not say it was an 80's crank but noted the crank journal diameters were common with later cranks

I found a pic of the two side by side the 79 wr 250 is on the right and the mystery is on the left.