Magnum XL 52 RFS the first runs

What is with me lately? The last 5 engines I have acquired have been of Chinese manufacture instead of Japan. In all honesty I have nothing against the Chinese made engines as long as I have no issues with them. Clearly the quality isn't up to par with any Japanese made engine in any respect, however that does not mean they cannot provide years of trouble free operation at a great price. The latest engine I look at now is the Magnum XL 52 RFS. I purchased this engine here from a great RCG member. It is a new and unused engine less the box and accessories. Again the external appearance isn't as refined and clean as the OS counter parts this is a clone of but it is a good runner. I estimate that this engines date of manufacture is the late 90's early 2000's based on the fact that it has no blue valve cover. This looks more like the ASP sister engine. I ran this engine for the first times today and was not disappointed at all. It took a prime very easily and hand started immediately. I did take a look inside the back plate and cam gear are before running. This engine was clean as a whistle and gleaming inside. Not one sign of corrosion or rust at all despite the theoretical age of the engine. I was shocked to see that the crankshaft incorporates a Woodruff for the thrust washer. This is a trait more indicative of the older OS four stroke engines. I did not see this on the ASP FS 80 or Magnum XL 70.