How to clean out a crankcase

Hello, I have a cf250 and the right side crankcase gasket got destroyed. It seems that a foreign object got in and spun around by the magneto. There is debris in the bottm of the engine and wanted to know if anyone had ideas about cleaning this out.
Would carb cleaner be a bad idea? I have an air compressor but I'm concerned about blowing pieces into harder to reach areas.
Thoughts?
Thanks-Rich

I would say plain diesel should be OK.

(Sorry the image is sideways)
Diesel fuel? Hadnt considered that...
Thx