The new closed-cartridge technology, patented by WP under the name 4CS possesses even more consistent damping characteristics and at the same time allows the driver to adjust end progression. The adjustment units are placed at the upper end of the fork and are divided into compression (left) and rebound (right). Hereby the driver can make adjustments directly from the driving position without having to use tools.
The new, maintenance-friendly construction makes it possible to dismantle the damping unit in just a few steps without expensive special tools. Now maintenance and individual adjustments to the respective driver can be performed in a shorter amount of time.
The patented 4 chamber system of the 4CS-fork unites the performance of the closed cartridge fork with the simplicity of an open cartridge fork and also has the benefit of additional weight reduction of the overall system.
During this process the cartridge chamber interacts with the inner-tube chamber through a base setting and thus ensures perfect damping characteristics throughout the whole spring travel and throughout a broad speed spectrum. A significantly higher damping stability can be achieved in particular in the high-speed segment. The piston-sided setting makes adjustments for various vehicle types in Enduro and Motocross possible. Through the coaxially positioned reservoir chamber, which is responsible for the prestress of oil volume, the installation space of the damping unit was used optimally while additionally reducing weight.
A further new development is the Pressure Release Groove (PRG) placed on the piston rod. It efficiently prevents excess pressure in the damping unit by automatically balancing the oil from the inner-tube to the outer-tube chamber. Thus a steady damping performance is ensured at all times, irrespective of temperature fluctuations and spring speed.
Apart from the main spring position optimized in terms of service and friction as well as the specially developed WP fork oil, which optimizes friction, stick-slip and wear, the 4CS fork offers never equaled, long-term performance reliability.
With this new fork concept WP sets new standards in the area of off-road telescopic forks and again fulfills its customer expectations regarding performance and quality while improving the operator convenience and ease of servicing.