Wilbers fork spring set, linear, for KAWASAKI Z 650, Type ER650H / ER650HA2, model year 17-, 40 mm lowering

Product details

Wilbers fork spring set, linear, for KAWASAKI Ninja 650, Type EX650K / EX650KA2, model year 17-, 40 mm lowering including seals, (fork oil please order separately), with ABE according to the application list

General description

Depending on the application, Wilbers offers progressive or linear fork springs, made from the best and highest quality chrome-silicon steel. For touring and touring-sport we generally recommend a progressive fork spring to optimise responsiveness and, on the other hand, to increase bottoming resistance. Crucially important is the combination of the "Zero Friction" fork springs with the specially developed Wilbers fork oil and observing the correct air chamber for the respective vehicle. If desired, individual tuning can be achieved in special cases by changing the air chamber.

For motorsport applications, we recommend the very lightweight linear chrome-silicon fork springs from Wilbers, which were co-developed by the motorsport team.


"ZERO friction" friction reduction through vibratory finishing:

During vibratory finishing, the components to be processed, such as Wilbers fork springs, are placed together with an abrasive media specially adapted for this purpose in a vibrating container, known as a trough vibrator.

The vibrations of the container create a relative movement between the workpiece and the abrasive media, and through constant rubbing against each other, lead to a smoothing of the component surface. At the end of the process, a fine, glossy surface is achieved.

For Wilbers fork springs, this reduction in surface roughness means a minimisation of friction = ZERO friction.


Each set of fork springs includes a recommendation for the viscosity of the fork oil and the height of the air chamber in the fork. These values have been determined by experienced Wilbers technicians and ensure optimal riding comfort and feedback on the handlebars.


Note: please order the fork oil separately.