ORIGINAL: MTK
The con rod is not bushed. I copied the photo and enlarged it to make sure. I see bearings on the rod's ends.
I'd find bushings on a gas rod's ends hard to believe from any manufacturer let alone OS. The engine may have other faults but the rod's ends are possibly not included on that list
Hope we get some more photos soon of the crank and bearings, etc. It does appear to be an aluminum rod, which is the first large gasser I can think of with that feature. I asked a while back on one of these forums about steel vs aluminum rods, especially in the small 20cc size, and the answers were generally that steel was used for durability...