I did this about 5 years ago so some of the details might be lost, but since there is no information on Italjeft Velociferos on the internet maybe someone will find this useful.
Also I owe most of the real effort to my buddy Mark who knows motors where I really only know how to make LEDs blink... I kept asking him "Oh sh*t, whats that part do?"
This should take a few hours and a few sodas to finish...
Step 1: Parts and Tools
You will need a Pollini 65cc Kit and an italjet velocifero.
Step 2: Look Under the Skirt
You need to unscrew the plastic shell over the motor. There are two screw underneath the scooter where the shell meets the frame.
Then two screws on the front bottom of the shell.
To get there you need to unflap the velcro cover on the bottom of the helmet storage area. Then hold the back of the screw with a 10mm wrench. There are two more screws holding on the seat, get rid of those. Then unscrew the passenger seat . Now you can pull this off.
Step 3: Helmet Lining
Step 4: Fuse
Step 5: Remove the Gas Tank
Okay so this is a bitch as well. There is a bolt connecting a strap around both tanks. Loosen this up.I had to hold the "nut" side down with a pair of channel locks. Then pull off the strap. And pull our the tanks. Now the tanks are connected to the carb. So its easiest to unhook the tubes at the tank. Its messy. Plug the holes and be happy.
Step 6: Remove the Plug for the Starter
Step 7: Remove the Cylinder
Step 8: Pins
Step 9: Rings
Step 10: Reverse It Al
This picture is of Mark and I trying to figure out if it actually sounds faster now...
Mark did all the real work, since I know nothing about motors.