Master simply means the chain has been changed..Normal preventive maint on a 130 at about 75-100K

Leak test will not tell you seals are bad , but will test the rings in that jug. You can do the same by simply making an adapter from an old plug and brazing an air chuck on it and hooking it to some air from a source. Then listen for crankcase blowby.

At that milage . seals are due.
It is also comon practice to retorque the head on these engines. We routinely do that when adjusting the valves, so you may be able to get rid of the weeping with a simple head retorque procedure....