Your windshield is attached to the bike with four screws. When you remove the two screws facing the drivers seat, the front panel above the grill will be freed. Remove this panel and you will see the four attaching screws. Be sure there is a rubber grommet around each screw. Before tightening these screws, it is a good idea to remove them one at a time and add a drop of loc-tite to the threads of each screw. Replace the screws but be careful when tightening them. Too tight could put pressure on the windshield. Now replace the front panel..using loc-tite on the remaining two screws is also a good idea. There's a lot of vibration on scooters and it is a good idea to check all visible screws on a regular basis.