Actully a torque spring does not change the engagement at all. It raises the shift point (meaning the engine rpm will be higher before it can start to force the driven clutch apart changing the drive ratio.) For instance with a stock spring the cart starts moving at 1200 rpm and at 1500 rpm the driven clutch starts to spread apart.
With a power spring cart starts moving at 1200 rpm and at 2000 rpm the driven clutch starts to spread apart.
