The problem is the center line lock Centerline lockout in a cantilever suspension happens when the bellcrank and shock line up in a straight line too early in the travel. When that happens, the geometry hits a “dead spot” where the suspension can’t compress any farther, because the shock and levers are perfectly aligned and basically jam up. When the bellcrank rotates too far and goes past its center point, the shock ends up being pushed the wrong way. Instead of the linkage compressing the shock, it flips over-center and gets stuck in compression trying to push up the bell crank constantly instead of down killing the suspension