The reason I pointed you to the thread is it shows how the various springs (and weights) interact with each other. As far as fixing your problem, you never really said what your problem is. If you put stiffer springs, or lighter weights in the driver (engine pulley), you will raise the RPM at which the "clutch" engages. If you put stiffer springs in the driven, you will raise the rpm point at which the "gear shift" starts to take place.