Originally Posted by Kalmarjaeger
...I wrestled with the servo vs non-servo assisted brakes and decided to wait for the non-servo. I can continue my suffering by waiting for the ASC option as well...is it just to keep you from spinning your rear on a hard launch or is it designed to keep your back tire from spinning up firing out of a curve?...
I think the current servo brakes are great, especially with ABS. In combination with the anti-dive front suspension they provide the best brakes (by far) I've ever experienced.
That said, they have a few artifacts such as servo sound, sudden boost onset at low speed, no assist with engine off, and what some describe as insufficient feedback. Despite these quirks, IMO the current setup is great but the new one sounds better.
Personally I think ABS is important on either servo or new non-servo brake system. Whether pavement is wet or dry, you only get one chance in a panic stop. It's not just a matter of maintaining control, but wringing out every foot of stopping distance. Without warning in a sudden situation, few riders can instantly snap to 100% braking from high speed. With ABS they can, which reduces the stopping distance on either wet or dry pavement.
Re ASC, I don't get it. It appears to only prevent wheel spin, not prevent the rear from sliding out due to accelerating in a corner. How many accidents are caused by spinning up the rear tire in a straight line? I guess a few, and in that sense ASC might help those. However the bigger problem is the rear sliding out in a curve, possibly causing a high side. I don't think ASC addresses that. It's the old traction pie-chart problem. So much traction is available for lateral and longitudinal (braking, acceleration) use. No motorcycle system can tell how much lateral traction is being used, so ASC can't prevent a slide out.
Honda had an ASC-type system on the ST1100 and didn't put it on the ST1300. I guess if you ride a lot in the rain, ASC might be worth it.
Maybe in the future a combination of yaw sensors, wheel spin sensors and inertial sensors could provide rear wheel slide out control, but I don't think so today for production bikes.
The MotoGP bikes have ASC systems. Even the world's best riders with superb throttle control find ASC useful in that case. However those bikes also have 240 horsepower and weigh about 2/3 the K1200S.