Dave Biezen wrote: Yes,...i tried a LUK, Valeo and Sachs without improvement.
Then i went with the original clutch from Suzuki and the vibrations were gone for 85%
Just a thought:
I work sometimes to minimize vibration in mechanical designs and noticed that the Lukas clutch i bought got three springs while the original japanese has four springs. I am guessing that this has litte or no effect on the clutch function since the spring pressure is as easily divided on three instead of four springs, but this will have an effect on the clutch plates internal vibratory frequency.
On my car there is little or no vibration when there is no load on the drivetrain, but vibrations when accelerating or descelerating.
my vibrations is also most noticable around 2000rpm.
When changing the mass of one of the items in the system, other items can come close to other items internal vibratory frequency and the total system can come out of balance.
We sometimes fix vibratory problems by changing the mass, moving bearing placements or changing rpm.
Edit: Also the transmitted torque plays a part so it is plausible that this is the case.
Prediction of these problems is allmost impossible, but as in all other things mechanical, if it works, do not fix it.
I would recommend changing clutch to original one or at least one with similar mass and design now that we know of these problems.
