Well today i took it all apart and the crank is in great shape, i dont know why but the piston was black at the top but it wipped off 90% of what was there. It wasnt completly black on the top but it had quiet abit. Also Lelend just got some back from pinch and they looked brand new polished and all for 20 bucks i dont think it will hurt to try other than trashing the engine. The grp look like it hasnt seen off road lol i got it used a while back for back up and ran it a bit and the guy said he ran 20% byrons in it so maby the black was from the oil not fully clearing out???