Maintain or adjust the hydraulic fork with Putoline HPX R in the prescribed viscosity
Fork oil flows during compression and rebound through precisely shaped passages, valves, and adjustment needles. The resistance encountered forms an important part of the incoming and outgoing damping. Old, contaminated, or incorrect oil can therefore be directly noticeable in the riding behavior.
In this collection, you will find Putoline HPX R in multiple viscosities. Choose the oil based on the workshop manual of the motorcycle or the technical documentation of the installed fork.
The spring carries the weight and determines how much force is needed to compress the fork. The oil and damping valves determine how fast that movement takes place.
Additionally, the fork oil lubricates internal sliding surfaces and helps dissipate heat generated during damping.
A lower viscosity generally flows more easily through the damping channels than a higher viscosity. This allows the fork to respond faster, depending on the internal construction and settings.
A higher viscosity can increase damping resistance but does not make a too-soft spring stiffer. Spring strength and oil damping each have a different function.
The specified W value of fork oil is not fully one-to-one comparable between all manufacturers. The actual viscosity at different temperatures can vary per product line.
Therefore, do not mix oils from different brands or types arbitrarily. Use the same oil in both fork legs and work with a precisely measured amount.
Besides viscosity, the oil level is important. The air above the oil acts as an additional air spring during compression, especially at the end of the spring travel.
Too much oil reduces the air chamber and can make the fork very progressive at the end of the stroke. Too little oil can cause foaming, insufficient damping, or internal problems.
Wear particles and contamination enter the oil through use. At the same time, the oil is repeatedly heated and mechanically stressed.
Change the oil according to the maintenance schedule or during an overhaul. For intensive circuit or off-road use, a shorter maintenance interval may be appropriate.
When replacing seals and dust caps, the old fork oil must be drained. This is a logical moment to inspect inner tubes, bushings, and damping parts and refill both fork legs evenly.
Bleed the cartridges or damping systems according to the workshop manual and set the oil height precisely. Have this maintenance performed by a suspension specialist if you lack sufficient experience.
