This machine would barely start, idle and cut out. Compression was puking out the intake, cuz exhaust valve was barely opening. Found several problems to share here.
The main reason this motor died was I found that the oil filter was installed backwards, so engine was run without oil. Top end suffered damage.
Found broken rocker with pushrod wedged beside it.
Also both valves were hammered bad from not adjusting valve lash.
Orderd all the parts to fix: valves, rockers, push rods, guides, seals, lash adjusters, gaskets, filters, etc. = $250