I purchased a YZ 144 kit from Eric Gorr and ran it for the summer. The bike ran amazing. I pulled the cylinder down this winter and found that a power valve bolt had come loose and was rattling around in the power valve area. Under closer inspection I found that the bolt hole was helicoiled crooked and the helicoil had pulled out. I contacted Eric and explained the situation. He said to send him the cylinder and he will make it right. I received the cylinder back the other day. The bolt hole was repaired, the cylinder was honed and he threw in a gasket kit and a set of rings. All for no charge. I know the issue should have never happened in the first place but it was good to see Eric stand by his work. Just figured I would share my experience.