Feature 1Applicable Model: Professional manufacturing, reed valve system is suitable for YZ125 20052020, and the manufacturer part number for reference is V4R04. 2Fine Workmanship: The reed tip surface is doubled compared to traditional reed valve designs. The bottom is increased, the middle is stronger, and the top is longer. 3Long Service Life: Reed valve system petals travel only half the distance, so they usually wear less than the petals in traditional reed valve designs and therefore last longer. 4Characteristic: New reed petal resin system, carbon fiber and lay up. The pre curved reed petal ensures a better seal at the tip. Wider reed cage allows for maximum airflow. 5Better Air Flow: The combined reed tip area is increased by 10.5%, resulting in an increase in total air flow. Airfoil shape added to cage tip to increase air velocity from outer ports.Item Type:ReedValveSystemMaterial: ABSOE: V4R04Fitment: Fit forYZ125 2005-2020Description:Theuniquedesign of the reed valve system features double the reed tipsurfaceover a conventional reed valve design. This has two majorbenefits: 1) The reed petals only travel half the distance as a conventional reed valve design to get the same airflow. 2) Because the reed petals only need to travel half the distance of that on a conventional reed valve design, there is a greater chance of them being fully opened as well as a better chance of sealing when they are closed. A reed petal never truly closes in aclassicsense, as it is always in movement. Consider this, an engine operating at 8,000 RPM results in a reed petal opening and closing 133 times in one second. This fact, sheds light on another advantage. Since the petals are only traveling half the distance, they generally last longer are they receive less wear than the reed petals on a conventional reed valve design.Fine Workmanship:Double the reed tipsurfaceover a conventional reed valve design.Increased bottom end,strongermid range and longer top end.Greater efficiency due to reduced reed petal travel.More airflow means more horsepower.Reduced reed petal wear.Screw free design eliminatesriskof screws going through motor.Screw free design enables super quick reed petal changes.Characteristic:All new reed petal resin system, carbon fiber and lay up.Pre curved reed petal ensures bettersealat tip.Wider reed cage for maximum airflow.Combined reed tip area increased by 10.5% resulting in increased totalairflow.Airfoil shape added to cage tip to increaseairvelocityfrom outer ports.Longreed stops added to progressively slow petal tipvelocity, for increased petal durability.Reduced frontal area of central wing by 15.6% combined with a more aerodynamic shape .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 xReedValve2 x Gasket4 x Screw4 x Nut4 xAccessories1 x ManualNote1. Please double check the part number of your item, matching information is for reference only.2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!