vn aero oil problems?

[COMMY VP 666]

hey my mate has vn 5litre

we are still trying to figure out whats going on

oil keeps getting clogged every time we start the engine

we have cleaned the hole engine out and just keeps happening

what is it? and what can or should we do thanks

 

[centy]

please explain better.
engine hole?
Did he change to oil?

 

[Pub247]

sounds like a blocked pick up