Firstly,
to the board!
Wow, that's a lotta acceleration, aye?
The problem is common on the new 1250. Apparently a number of instrument pods weren't installed properly on the assembly line. To fix it, you only need to remove the two bottome screws and flip it over to see where it plugs in.
The rubber grommet circled in red will accept the white plastic probe on the back of the instrument cluster:
Make sure it "snaps" in securely. (ignore the white arrow)
Then you'll need to snap the upper tabs on the top edge of the instrument panel into those square slots on the inner fairing (seen right above the red circle). Then replace the two bottom screws.
That should take care of it.