Ok now normaly the handle on scooters are good, but some time they come off
You will need:
2 zip ties
Your "broken" scooter handle (or pipe insulation)
And a scooter
Step 1: Zip Tie, Scooter Grip, Scooter
Loosly put the zip ties on the handle (foam grip)
Then put the foam grip on the scooter
Step 2: Scooter (with Grip)
Then you will pull the zip ties to make them tight.
Then cut the extra off.