Note:1. Please double check the part number of your item, matching information is for reference only._x000D_2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks! specification:Item Type: Reed Valve System_x000D_Material: ABS_x000D_OE: V4145_x000D_Fitment: Fit for YFS200 1987-2006 US_x000D_Description:_x000D_The unique design of the 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) 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 a classic sense, 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._x000D_Fine Workmanship:_x000D_Double the reed tip surface over a conventional reed valve design._x000D_Increased bottom end, stronger mid range and longer top end._x000D_Greater efficiency due to reduced reed petal travel._x000D_More airflow means more horsepower._x000D_Reduced reed petal wear._x000D_Screw free design eliminates risk of screws going through motor._x000D_Screw free design enables super quick reed petal changes._x000D__x000D_Characteristic:_x000D_All new reed petal resin system, carbon fiber and lay up._x000D_Pre curved reed petal ensures better seal at tip._x000D_Wider reed cage for maximum airflow._x000D_Combined reed tip area increased by 10.5% resulting in increased total air flow._x000D_Airfoil shape added to cage tip to increase air velocity from outer ports._x000D_Long reed stops added to progressively slow petal tip velocity, for increased petal durability._x000D_Reduced frontal area of central wing by 15.6% combined with a more aerodynamic shape. Features: 1Fine Workmanship: Compared with the traditional reed valve design, the reed tip surface is doubled. Increased bottom end, stronger mid range and longer top end. 2Long Use Life: The reed valve system petals move only half the distance, so they usually wear less than the reed petals in the traditional reed valve design, so the service life is longer. 3Characteristics: All new reed petal resin system, carbon fiber and lay up. Pre curved reed petal ensures better seal at tip. Wider reed cage for maximum airflow. 4Better Air Flow: Combined reed tip area increased by 10.5% resulting in increased total air flow. Airfoil shape added to cage tip to increase air velocity from outer ports. 5Safety Design: Screw free design eliminates risk of screws going through motor; Screw free design enables super quick reed petal changes. PackageList:1 xReedValve 2 x Gasket 4 x Screw 4 x Nut 4 xAccessories 1 x Manual