Chainsaw Repair

I'm working on a Husqvarna 51 chainsaw.  Replaced the piston/cylinder 5 years ago with aftermarket parts - worked great for 5 years.
Recently lost compression

replaced piston/cylinder/ring/bearing with another aftermarket kit.
Compression good - saw started up, ran for 1 minutes, jammed/seized.
Ordered another piston/ring - saw started up, ran for 1 minute, jammed/seized.
I'm a glutton for punishment so ordered a full replacement kit piston/cylinder/ring - and again after 10 seconds of running jammed/seized
Went back to look at the current/previous pistons and the scoring is the same location on all.   Assuming there's something breaking apart and causing the similar damage:   
Inspected the ring, looks correctly orientated.
Inspected the retaining clips, look good, in place, no damage.
Inspected upper bearings, look good, no damage
I don't see any inside damage that is throwing metal to cause the scoring.
I'm having 1 last kit sent to replace the last one - any thoughts on what could cause this similar problem?
Do these cheap kits need to be honed/polished in any way - they come together smoothly and look ready to install.
Keep in mind the cylinder/ring/piston were replaced as a set and took on similar damage without heating up.
Plenty of oil left behind, lubed it up and pulled it 20-30 times before starting and did not feel any issue when pulling.

Pictures attached to show location of damage.  Thanks for any help before I give it a last try with the replacement parts.

-wayne

Check crankshaft bearings and rod bearing.  That looks like damage from foreign material.  Bearing are probably coming apart.

Big end rod bearing and crank bearing cages etc.  Look at them closer.

Yes.  Decomp hole is lined up with score. 

the original cylinder did not have the decomp hole.  The 1st aftermarket cyclinder (which is made for 51/55) and all subsequent ones have the same hole / same location.  I've been capping the hole with external bolt that was included with original replacement cylinder.