Head steady and also anything else preventing full lift of engine, carb-filter connection, coil pack must be removed. Rear suspension loading hinders/resists the freed engine cradle lift-pivot on the rear iso, so helps to have frame on a box or lift so rear mass helps counter engine weight. Not too hard then to lever or jack up from under to get front mount to clear frame tabs. Measure distance betwix front tabs then the length of new mount to know where to set it or what to alter [ugh] til it slips right in, ie: with reasonable levering & pounding so iso bolt slides home. Then can play with the gap vs vibration vs handling till sweetest compromise in untamed flying carpet. Can take a few 100 miles to bed in. I am very pleased with the gap vs vibration vs handling after 45' beveling off the corners of the big cushions on my un-tamed flying carpet.