I recently became aware of a Chinese-made engine of which I had no previous knowledge. This was a T.Y.C. 2.5 cc diesel. It’s a fairly simple plain-bearing radially-ported design which appears to be rather similar to its Chinese Yin Yan/Silver Swallow contemporaries. All I know so far is that the T.Y.C. engines were reportedly manufactured in the early to mid 1980’s. Does anyone out there know more?!? If so, please respond!! All input gratefully acknowledged!