As I mentioned the XR isn’t so healthy. Aside from it’s bent axle, oil lines, and the dozen other worn out and broken parts, the motor is also toast. There’s no compression, so I got to tearing it down in a makeshift outdoor garage.
The workbench:
The carb intake shows the source of the problem….. lots of dirt…. 
Thankfully the rocker arms and cam look awesome.
The cam chain tensioner retaining bolt is stripped though. I need to find a dremel or something to cut a groove into it and try to hammer it out.
More to come.
