Patricio,

I can't tell totally what it is that I'm seeing. It looks like the exhaust valve is dropped down but it doesn't look like its just the valve. Is the Valve seat also sticking out?

Not sure what would have caused it. I would say contact your importer for the engines or contact YS Japan. If you got the engine from the USA then you can get in touch with Richard at

www.yspartsandservice.com

But they are importers for North America and they don't do the warranty work for YS japan. I have never seen a valve fail like that before. Sure I bet there have been some but I have never seen it.

The valve seat is pressed into the head. If the seat and all "fell out" I would think its a warranty issue. Not sure who does the importing for your country.


Troy Newman
Team YS Performance