Cool.
If you need to adjust it, in teh 5th picture, the screw on the bottom, with teh circumferential slot under it should adjust the zero point.
the screw (s) on the left, on the arm of the bellcrank with the sector gear on it should adjust the ratio.
The bourdon tube will expand with added pressure and Pull the left side "down" in pic 5. that will then cause lever arm on the sector gear to pivot the assembly on the pin on the left, turning the gear and shaft attached to the pointer.
Everlast 200DX
Everlast PT185
Shoptask 3-in-1 (not currently in my garage, but I own it...)
Any day on a motorcycle like this that ends just needing parts and labor is a good day.
4.82, 158.67mph 1/8th mile 7.350, 200.35mph 1/4 mile