Recent content by Frenchy13

Hi all, Posted a little back about piston scoring and finally got around to dismantling the engine. While I was removing the exhaust/power valve I noticed the part of the cylinder that houses the left exhaust valve has broken. Has anyone encountered this before? I can't seem to find any...

Pretty new to all this so just wondering if anyone may know what caused this type of scoring on a used '04 EC 250 GAS GAS I picked up. Going to replace the piston but also wondering if the cylinder will likely need replating as a result of the 2 deep gouges that can be seen or is this from the...