First off, I have to say that ANY upgrading of your scooter or repair for that matter if done incorrectly or with the wrong parts can be very DANGEROUS. So I recommend that no one do this conversion. Now on with the instructable...
I had read about the process for this upgrade years ago when I had my Elite 250, this process was taken from the Yahoo Honda Elite 250 Group and the tech tip from Randy Pozzi and Dennis Flora. It seems like you hit a bump and three miles later you are still bouncing along. It seems sensible that putting Honda CB350 shocks on your Honda Elite can be a good choice to improve handling, but the side by side comparison is shocking. The Elite shock looks like it is meant to hold up a hatchback rather than safely keep you on your bike.
Step 1: Take Off Body Pannels
Remove the side panels of your bike. There are four steps that you need to go through. Disconnect the turn signals (two wires each side with a junction under the rear bumper). Remove the 12 mm bolt (hidden by the rear bumper)
Take out the screw (under the passenger foot peg)
Finally there is a peg under the passenger handle that just pulls out.
Replacing the screws and bolts where you found them can help keep them straight for reassembly.