If you've read anything I've previously written about the Z4MC's OEM suspension, I've always said that the front is too soft and the rear is too stiff. The front springs are made from 11mm diameter wire and the rear is made from 19mm diameter wire. I'm sure that you'll find that any aftermarket suspension will redress this gross imbalance. The ACS Racing has front spring of 14mm and the rear is 16mm, so you can see that in the case of the ACS at least, the front suspension is stiffened and the rear is softened. I think that the the KW Clubsports use similar wire diameters.
Although the springs remain the same with any specific adjustable suspension system, such as KWV3, the adjustment of the dampers between the softest and firmest of the settings coupled with the differences between the front/rear settings, makes a huge difference to the ride and handling. Although some of the high end suspension dampers have a total of, say, 30 or more "clicks" in the range for adjustment between softest and hardest settings, in reality, to make any noticeable changes, you'd be making adjustments of at least 3 clicks at a time, to have any initial noticeable change, so in effect, this is essentially the same as adjusting a damper with a range of 10 clicks by one click at a time. My KWV3s have 14 clicks in their range, whereas the ACS Racing has 9 clicks. I haven't found the difference to be a problem with the ACS Racing because both KWV3 and ACS racing suspensions have enough of a range to give a very noticeable difference between softest and firmest settings with a good transition between each setting.
If I were you, I'd ask Beedub or BMWZ4MC if you could have a ride as passenger on the roads in their cars with the Clubsports fitted to see how they feel before I spent my cash.
I also have Rotax Max go-kart and I certainly wouldn't want suspension as stiff as that on the roads, it's bad enough on any little bumps on track!
Liverpool
