First off, both the scooters you are looking at are proven products from reputed Japanese makes, so in the end, whichever one you decide to go with, you should, by and large, have a good experience. 

The Suzuki Access is a stellar family scooter option because it has traditional strengths like comfort, practicality, fuel efficiency and a reputation for reliability. Also, it is rather fun to ride with its peppy engine and balanced handling. It also has a bigger underseat storage area, which is a USP in comparison to the Yamaha Fascino 125.

The Fascino's strong points are that it is exceptionally fuel efficient and it is one of the lightest two-wheelers on sale in the country today. If those are important to you and your wife, then the Yamaha would make for a sensible purchase.

A test ride of both will help you decide which is the better fit for you. 

The lightest petrol-powered scooters in India are the Yamaha Fascino and Yamaha RayZR, both coming in just under the 100-kilo mark. 

Other models you can consider are the TVS Scooty Zest 110 and Honda Dio 110, both of which are just a few kilos heavier than the Yamahas. Don't purely consider the specifications on paper. We would strongly recommend you go to a showroom and at least sit on the scooters to see which one is manageable for your petite physique. 

The most fuel-efficient scooters in the 125cc space in our tests have been the Yamaha RayZR and Fascino models. Both are mechanically and feature-wise exactly the same, with only different bodywork and styling separating the two. Some other proven and reliable options to consider are the Suzuki Access, Honda Activa and TVS Jupiter models - these are also practical, fuel-efficient, reliable and comfortable scooters with widespread service networks.

Scooters you can consider are the TVS Jupiter 110, Suzuki Access 125, and Honda Activa models. All of these are lightweight and manageable. 

If you want something even more approachable, then the TVS Scooty Zest 110 or the Yamaha RayZR / Fascino can be considered.

 A test ride will help you decide which one suits you best.