(The unique design of the VForce reed valve system features double the reed tip surface over a conventional reed valve design. 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".

(The unique design of the VForce reed valve system features double the reed tip surface over a conventional reed valve design. 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".

(The unique design of the VForce reed valve system features double the reed tip surface over a conventional reed valve design. 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".

(The unique design of the VForce reed valve system features double the reed tip surface over a conventional reed valve design. 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".

(The unique design of the VForce reed valve system features double the reed tip surface over a conventional reed valve design. 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".

(The unique design of the VForce reed valve system features double the reed tip surface over a conventional reed valve design. 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".

(The unique design of the VForce reed valve system features double the reed tip surface over a conventional reed valve design. 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".

(The unique design of the VForce reed valve system features double the reed tip surface over a conventional reed valve design. 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".

(The unique design of the VForce reed valve system features double the reed tip surface over a conventional reed valve design. 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".

Moto Tassinari and VForce4 decals, detailed installation instructions, complete VForce4 reed valve system (including reed petals) and gasket. NEW AND IMPROVED VFORCE4 FEATURES. YAMAHA MODELS: Yamaha YZ85 1993-2022 4 Reed Valve System.