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Just out of curiosity, did you make sure the valves were adjusted properly before performing that compression test? I ask because the number one most neglected and overlooked thing with these bikes when they are assembled is that the valve clearances are never checked or set, and they almost always come from the factory with no clearance at all, or even tight. After a little bit of riding, the valves will actually stretch a little during break in, and cause all sort of issues from not sealing with the head. A poorly adjusted valve can cause all sorts of issues, including extremely low compression.
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