Timing belt and gaskets

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Just purchased my used Hi jet truck (EB-60 engine, 547cc)yesterday. It was performing perfectly taking it home but died in a turn and I had to tow it the last two miles. It will not start. Seems to lose compression. I'm working on it now and (since this is my first Daihatsu truck and I have no manual, of course) cannot find the timing belt or the gaskets. CAN SOMEBODY HELP!?!?! Any clues on this problem?