I had read all the reviews here before I bought a WAVE for my wife. We together have done around 1500 kms on the scooter. There are quite a few problems which I had noticed and thought I would put it here.
High accelaration from a standing point creates screeching noises in the engine. Not sure what causes it but it is very scary and annoying.
Front suspension is very weak and is already giving a lot of noises. I have tried to grease them but the sound is always there.
You will have to try this. Put the scooter on the center stand. Now remove the stand and move the scooter backwards while holding it at an inclination (bent slightly say 30 degrees). Just like you would do when pulling out of a parking lot. Now try to start the scooter. The starter kicks in but the engine will not start. You will hear a lot of metallic noises but the scooter will not start. Now you will have to push the scooter at atleast 10 KM speed and now hit the start. The scooter will start now. Maybe this is a problem with my scooter only.
Spares are not available. There are no floor mats available anywhere in Bangalore.
Mileage is not 50-55 as claimed by Bajaj but around 35-40.
Road humps tend to throw you up from the seat when the rear wheel crosses the hump
Apart from these the scooter is OK. I once tried racing a Honda Activa but could not keep up after 20 meters.