Ahhh ok. You had the slipper set to slip. Who would've thought??
I think if/when you upgrade the motor you'll be back to full tension on the slipper, but it will slip anyways. Some guys with lighter ST's like myself could get away with not having a slipper since the tires would just spin, not putting much stress on driveline components. But once you're into the 8+ pounds range with 5" tires it becomes more of a necessity.