My friends (used to be mine) YZ250 quit running the other day. It still has compression. When he was riding it, it bogged then quit running. He kicked it over again and started and idled for prolly 5 seconds then bogged and died. If someone could help, cause nobody on Everything2Stroke will help, they are all worried about their blasters and banshees. Somebody help. Also, he replaced the seal behind the countershaft sprocket and it still leaks.