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    rod knock on my 4 stroke 250cc? (wall of text)

    Hello, i have a question, i have a Chinese bike a orion 250cc a 4 stroke air cooled engine. The factory that made it is ATV | Dirt Bike | Pit Bike | Electric Bike Manufacturer And Wholesaler-- China APOLLO/ORION/HYENG/HYENA Sports. and they dont want to send me a explosive view of the engine...