After chasing gremlins out of the shop and a few more runs around the track, I think the shakedown runs are over, and it's time to continue.
I stripped everything back down to the bare frame.
I found another badly rusted spot in the frame. I did the same as last time: I shoved a slug of metal in the hole, welded it, and ground it until you couldn't tell.
I got the axle mounting areas cleaned up a bit.
Not perfect, but much better.
This is where I had to trim the spine for engine clearance. I didn't see the Bluetooth welds here. Maybe that's the cause of all the frame flex I was having.
Back in the scrap bin. Cut, bend, and trim.
And some awesome welding. That tube is so thin; it's hard not to blow through it.
And then I made a new tab for the seat mount out of some thicker stock.
Hopefully, there should be some room for spark plug maintenance.