those jiggers are mostly intended for light dirt bikes,no worries if its a 125cc two stroke,i wouldn't strap say an old 600cc four stroke thumper on it,just get a proper trailer,as said before you've got to know what your vehicles downward load rating is,they can tow much more than the downward pressure,i built a trailer with tailgates you can remove and a bolt on jigger to steady a bike on.