Hi all. Trying to help a friend figure out his moto issues. the bike is a 2014 YZ450F with maybe 30hrs. The friend told me the engine won't kick start or pop start. when it did run, it blew oil out the breather hose. The first thing I did was put the motor on TDC and perform an audible leak down test. Intake was tight. Exhaust was tight. Crankcase leaking air badly. In light of the combination of the blow by symptoms and the failed leak down test, I told him his rings were bad and a top end tear down to confirm, and probable top end rebuild were in order. I also told him to get a second opinion. I just think it is weird for such a new and high quality machine to have issues like these so soon after rolling off the dealer floor. I was also thinking of a broken ring? Does anyone have any other ideas or can anyone confirm my thoughts? Thanks.