Fork Oil for ETV CAPONORD
front and rear. Panniers were full tankbag was full no topbox riding solo.
THE BIKE originally shipped 20 weight oil for the forks. That was much to stiff for me. I talked with them and they suggested trying 15 weight and that 10 would probably be too soft. I tried the 15 weight and it was improved but still pretty harsh especially on small bumps.
A friend with lots of experience related that he uses Silkolene 2.5 weight in his sport touring bikes (such as his Honda Hurricane and Ducati ST4). I installed 4 weight (actually aircraft hydraulic fluid, previously known to old Beemer riders as Aeroshell 4). I LOVE IT!! Compression damping is just fine. Rebound damping might be a tiny amount too little, but not enough to matter. Even dive under heavy braking is reasonable....much less than with the stock springs.
,It is difficult to get the right oil viscosity for everyone. Typically I ride 2up with wife, 400# plus gear, plus luggage, easily 440-450# total load. Even under those circunstances I may try W15 next time, but for sure not less.
The Dutch WP is working with BMW, supplying the shocks and spring for the new K1200 S /R /PowerCup models. WP engineers (like Hyperpro) have designed a retrofit to the Front Springs for the Capo, as well as a rear shock. BTW, by coincidence those front springs are progressive too. They recommend from 5 to 20, depending on the typical bike loading. I suggest a look into the WP website, good stuff there.
Here I am pasting some info from WP:
...the progressively wound Pro-Line front fork springs of WP Suspension play a fundamental role in the operation of your front fork. The springing and damping characteristics of your front fork can be fully optimised if the correct springs are used.
Many motorcyclists know the problem of too soft front fork springs which can result in bottoming of the front fork when braking or too much movement and poor handling of the front fork during braking and acceleration. Original front fork springs can also be too hard which causes the front fork to shock the steering and the entire bike to feel uncomfortable on uneven road surfaces.
With the WP Pro-Line front fork springs you are taking the first step towards optimum road holding at an attractive price. The springs, progressively wound from high-grade silicon chrome spring steel, ensure that your front fork will respond better (improved comfort), and react more controllable when compressed under braking (more stability, resulting in greater safety).
In most cases motorcycle manufacturers use linear wound front fork springs which are often in the beginning but also at the end of the stroke, either to soft or to hard. Progressivity is lacking. With progressively wound WP springs you can solve this problem, once and for all.
Nov 10, 2008 |
2004 Aprilia ETV 1000 Caponord