Vforce Reed Valve - Honda
SAVE 5% VForce
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) 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 VForce advantage. Since the petals are only traveling half the distance, they generally last longer as they receive less wear than the reed petals on a conventional reed valve design.
Fitment:
Fitment Part
Number
HONDA-
CR85 1996-2007
(Vforce 3)
V381S HONDA-
CR85 1996-2007
(Vforce 4R)
V4R81A HONDA-
CR125 1987-2000
(Vforce 4R)
V4R01D1 HONDA-
CR125 2001
(Vforce 3)
V301B HONDA-
CR125 2002
(Vforce 3)
V4R01D2 HONDA-
CR125 2003-2004
(Vforce 3)
V311A HONDA-
CR125 2005-2007
(Vforce 3)
V321A HONDA-
RS125 All Years
(Vforce 3)
V4R01H HONDA-
CR250 1982-2001
(Vforce 3)
V305A HONDA-
CR250 1990-2001
KART
(Vforce 3)
V305B HONDA-
CR250 2002
(Vforce 3)
V315A HONDA-
CR250 2003-2004
(Vforce 3)
V315B HONDA-
CR250 2005-2007
(Vforce 3)
V325A HONDA-
CR500 All Years
(Vforce 3)
V3170B
OR
V3170C
(New
Model)
Description
VFORCE 3 FEATURES
- Double the reed tip surface over a conventional reed valve design
- Increased bottom end, stronger mid-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 eliminates risk of screws going through motor
- Screw free design enables super quick reed petal changes
IMPROVED VFORCE 4 FEATURES
- All-new reed petal resin system, carbon fibre and lay-up
- Pre-curved reed petal ensures better seal at tip
- Wider reed cage for maximum airflow
- 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
- Long reed stops added to progressively slow petal tip velocity, for increased petal durability
- Reduced frontal area of central wing by 15.6% combined with a more aerodynamic shape
ALL-NEW VFORCE 4R FEATURES
- Rubber overmodeling on reed tip surface of cage to further enhance petal life
- Extended reed petal stops
- Pre-curved reed petal ensures better seal at tip
V3170C - NEW MODEL
The 2024 reboot of the VFORCE3 for the Honda CR500 utilizes an all-new three port reed cage which offers both greater airflow and improved strength. The new "C" air guide provides even more airflow. A redesigned manifold features short reed stops allowing greater range of motion for reed petal travel. And last but not least, fit has been greatly improved.
