The heart of my Fokker

Today I received the engine for my Fokker, a 85 cc four stroke two-cilinder inline airplane engine from Roto!

Fits perfectly:

The cylinders are positioned behind the grill very well and the real valve covers fit very well underneath the dummy engine hatch:

I would prefer a scale exhaust, so that is still a puzzle to sovlve, but I’m first going to build up the nose and figure things while building: