I am the owner of Yamaha SZ. It is a good and smooth bike. Mileage around 45 kmpl. There were some problem faced by me. One, I purchased in Feb 2012 and was given a bike manufactured in Jan 2011. I came to know this only when I received the RC book. So be careful when you buy this from the dealer. Second, I had to change the battery in 2 months time.
I don’t know what battery the dealer had put in. Third, please put the petrol lock, since my entire petrol was stolen from my society building itself.