Since I have mounted the Hyperpro rear shocks the problem occured driving on rough roads or speedbumps. Especially with two way up. I had a serious search before I found out that the problem was in the Predator. Because with the standard shock I had no problem. But because the rear fork is mounted to the powerplant, the upwards movement of the fork wil also have a rear facing power ( away from the bike). Then the motormount will be pulled to the rear. The Predator is not realy designed to absorb