Not a big job .. We stand the bike on the rear tires & rear rack (turn fuel off and pinch fuel cap breather) ..Remove front wheels , unbolt (3) mounts for front differential and slide if forward and tie it .. Using a prybar pop the drive shaft joint off the motor .. Then using a pick/screwdriver dig the old seal out (careful not to mark the output shaft) .. Replace the seal keep it square as your tapping it in place ..