Hello! Im doing top end rebuild on my kx250f, and when i removed the cylinder a small amound of dust drizzled down into the bottom end on the cranck from the cylinder gasket.
You thing some of it will come out with oil if i flush it through like 2 times before i start it? Or are the seals and bearings doomed down there and my new cylinder..
(Not a lot of dust, but still...)
Depends on the amount of dirt that got in there obviously ...
I'd probably just put it back together, turn it over several times (without starting it) then drain it. Repeat.
You'll be fine.