I have a M7 with the Engine Tech 900 BB running SLP twins, PC-V BDX intake, BDX power valve delete. I just built this sled over the summer as a project and now desperately need some clutching guru help. I ride from 9k-12k I threw in some 67.5G weights I had and a titanium green dot spring, problem is it engages at around 3500 and runs out to only around 5700-6000. When I take the belt off the primary slams hard at around 3500. My thought is the spring is my issue (worn out spring), but do you think I need heaver weights as well? BTW I am around 235lbs ready to go. Any help or suggestions would be greatly appreciated!