Just take out the bulbs, look at them to check if they are broke and take them to a scooter shop to buy new ones if they are.
On my Super 8 4 stroke if one of the bulb are not working the other one will also turn off.
Does the long light work ?
This is one of the bulbs from my scooter. Its called 12 Volt 35/35 Watt HS1. Yours might be different.
In this bulb the wire is broke.
You need to remove the front cover over the bulbs and get your hand inside behind the bulbs to remove them... its tricky.
When handling the bulbs dont touch the bulbs glass with your fingers.