It should be done on the wheels and held straight/vertical, if you do it alone a small bubble level across seat helps. practice a few times to raise to level point slowly, don't go over, bad reading. A good copy/paste/touched up, from old thread.
1. Check with the Engine Cold.
2. On a Level Surface.
3. Use the Side Kickstand.
4. Remove and Clean Dip Stick.
5. Insert back in hole without threading it into the hole.
6. Put the scooter in a Vertical Position for a moment.
7. Return to Side Kickstand.
8. Remove Dip Stick and Check Oil.
9. Level should be in middle of range. Cold.
10. Service as Required, Re-Install Dipstick.