Our
Wilbers-PA
solution maybe is the most comfortable way to adjust the spring preload. Using a hand knob that comes with a bracket specified for your motorcycle, you can easily adjust the riding level to match additional passenger and/or loading situations. The adjustment range is 10 mm.
The X-PA offers you the option to regulate the spring preload and therewith the vehicle level by the included box spanner in a breath. The purely mechanical adjustment mechanism is very light and, due to its robustness, best suited for enormous loads. The adjustment range is 15 mm.
The ZF-PA is a hydraulic spring tensioner that is directly integrated on the shock absorber. The advantage is that you do not have to mount an external hand knob to the vehicle. Nowadays especially current motorcycle models rarely offer space for a separate had wheel. Easily reachable and adjustable without much force, this preload option can be tuned for up to 15 mm.
The
E-PA is an electrohydraulic spring preload. This system is exclusive to our WESA-X shock absorbers. Using the control unit of the WESA-X system, you can adjust the seating level at the push of a button to different loading situations in 5 steps.
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With
the Wilbers ride-height-adjustment the length of the shock absorber can be modified over a thread located at the lower shock mount for +/-5mm. Normally this is possible while the shock absorber is installed.
Depending on the type of the motorcycle, the seating height can be adjusted for up to +/-15mm. This is for example useful on the racetrack to influence the caster and therewith the steering behavior of the motorcycle.
Originally, the Harley Davidson Nighster RH975 had linear fork springs. These have been replaced by Wilbers with progressive springs, which gives a much better initial response and more reserve in the second spring rate.
The rear shocks are slightly underdamped, which makes it feel like you are riding solely on the spring.
This makes the handling very "spongy" and "imprecise". The Wilbers solution solves this problem.
In the series, linear springs are also mounted on the suspension struts. With our suspension struts we use progressive springs with a matching block value. This has the same positive effect as the fork springs.
In combination with optimised rebound and compression damping, the result is a significant gain in comfort. The vehicle rides much safer and more stable with the Wilbers conversion.
With the same seat height, we were able to increase the suspension travel from 76mm to 82mm. With the 10mm increase in height, the travel was even increased to 93mm!
After a facelift our shock absorber type 632 now carries its compression tank on a high-quality milled aluminum part. New is the blow-off compression valve which consists of a combination of high- and lowspeed valve. Thus the shock absorber is much more compact and even more individually useable. With a setup range of 22 clicks it offers you an adjustment as easy as exact no matter if you prefer a sportive or comfortable ride. The continuously adjustable spring preload as well as the rebound damping adjustment in 22 clicks is, as usual, standard for this shock absorber. Furthermore radial piston technology and a wet run guidance provide for most sensitive response behavior and maximum longevity. Product may vary from picture.
Spring preload and rebound damping adjustable. Hydraulic preload adjuster and ride height adjustment not possible
Spring preload and rebound damping adjustable. Hydraulic preload adjuster and ride height adjustment not possible
Spring preload and rebound damping adjustable. Hydraulic preload adjuster and ride height adjustment not possible
Spring preload and rebound damping adjustable. Hydraulic preload adjuster and ride height adjustment not possible
Spring preload and rebound damping adjustable. Hydraulic preload adjuster and ride height adjustment not possible
Spring preload and rebound damping adjustable. Hydraulic preload adjuster and ride height adjustment not possible
Spring preload and rebound damping adjustable. Hydraulic preload adjuster and ride height adjustment not possible
Spring preload and rebound damping adjustable. Hydraulic preload adjuster and ride height adjustment not possible
Spring preload and rebound damping adjustable. Hydraulic preload adjuster and ride height adjustment not possible
Spring preload and rebound damping adjustable. Hydraulic preload adjuster and ride height adjustment not possible
Spring preload and rebound damping adjustable. Hydraulic preload adjuster and ride height adjustment not possible
Spring preload and rebound damping adjustable. Hydraulic preload adjuster and ride height adjustment not possible
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Parameters in mm based on vehicle height
RAL
Here you can find an overview of the available colours