Ok guys I bought a svl95-2s a couple months ago not running the owner claimed it wouldn't regen then it just stopped starting all together he claims he sent out the email and had the def deleted but it still won't start. So I looked at it and it wasn't locked up sounded normal cranking oil and water looked good the unit has just over 1600hrs. So I bought it for a great deal I felt, I just got around to looking at it. I ordered a compression tool for the v3800 and discovered one cylinder had no compression I mean zero. So I pulled the head and discovered a melted piston. I believe that the injector was stuck and just pouring fuel in the cylinder. I guess the owner thought that the smoke was from the regen. Don't know how it wasn't fuel knocking. But my questions are should I just get a machine shop to over bore it and put all 4 over size pistons or should I just get the one liner replaced with a standard piston? Also are the aftermarket parts just as reliable or should I only use oem kubota parts?