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Moto Tassinari VForce4R V4R04 Reed Valve Yamaha YZ125 2005-2017Details:The all-new Moto Tassinari VForce4R for the Yamaha YZ125 offers enhanced reed petal life as well as all the added benefits of the unique VForce reed valve design.The unique design of the VForce reed valve system features double the reed tip surface over a conventional reed valve design. This has two major benefits: 1) The reed petals only travel half the distance as a conventional reed valve design to get the same airflow. 2)...

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