Need a measurement of Flathead steering damper shaft

[KNUCK]

So I am putting together a steering damper for a flathead from parts on hand and it appears I only have a shaft from a big twin. I would like to cut down this shaft but need exact length from end to end of the shaft. It makes a difference as the spring has to fit just right for the tension on the adjuster knob to be in range. Thanks

[Rubone]

What year are you dealing with? All Big twin from '36 to '48(and '49 with Springer), and 45 from '40-'57 are the same length.

[KNUCK]

So I'm off on the description and likely on my own. After further review this appears to be a pea shooter, baby springer '28 or '29 ?

[Rubone]

So I'm off on the description and likely on my own. After further review this appears to be a pea shooter, baby springer '28 or '29 ?

Those stems are the same length as a later DL/RL I-Beam fork. However, they didn't have steering dampers on them. The first steering damper was a '30 up accessory item.

[KNUCK]

Thanks for your help.