My 750K1 had only 19k miles on it when it started leaking last Jan. I was just going to do the top end when it became obvious the cam chain had been slapping around making a mess for a while. After replacing all the chains, guides, tensioners, bearings, seals and gaskets, remounted the engine and vroom sounds great, but still leaks! It appears to be running out from the bottom two fins on the cylinder jug. Very disheartening after all that work and expense.