Unfortunately, what Earl says above is correct. Russian engines sold through shops etc. were/are awful, and IMO not worth wasting time on.
However, I own a superb engine picked up from the Russian team at a World CL Champs during the nineties, and even the Russians who traded the engine couldn't put a name on it.
They just said that many high level aeromodellers worked in the aerospace industry, and made a few model engines, mainly for international competition, when workload allowed. And a few of those engines get sold...
One point that hasn't been mentioned is that, IMO, this one looks like a car engine.
There's a small but thriving nucleus of "modern" tether car enthusiasts in Europe and Scandinavia. It would be worth asking the European tether car brigade.