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  1. SX Engine/Carb/Drivetrain
    Has anyone had problems with the valves? The valves on my SX engine have around 250 running hours and in all this time I have only had to change the shims once to set the clearance. I would like to know if with this ammount of hours a valve could crack and make a real mess. Would you suggest I...
    sx valve breakage sx valve lifetime
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