We have been through this before.
The definition or "rebuilt" is varied.
To some, 'its all been rebuilt" means just that:
Engine hot tanked/cleaned
Crank rod pin turned/ground to undersize
and new corresponding size rod installed.
Cylinder rebored/honed to remove taper and out of round, with new piston rings and pin/keepers to match.
Valves resurfaced as well as seats or replaced.
Guides replaced if worn.
Cylinder head resurfaced to true it up.
New ball bearings for the crankshaft if needed.
New seals for the crankshaft.
Then address the fuel system: carb, filter hoses, air cleaner.
Then the ign system points, plug, coil?
There might be other concerns like Gov gear or something out of the ordinary.
Then there are "flippers" definition:
its all been reconditioned/rebuilt/ remanufactured.
First and foremost a rattle can of paint on a dirty engine and other parts.
The spark plug was replaced,and oil changed
Then any simple repair so it starts and runs, might go as far as slapping in a set of rings to stop the mosquito fogger effect.
and a good used battery.
your milage will vary.
