If you want to enjoy riding right now than take Yamaha FZ fi v3 and forgot everything.You become peace of mind. No need to wait some other model's are engine type because westing your time.

Yamaha FZ-FI and FZS-FI haven’t received major updates with BS6 emission norms. The bikes continue to be powered by the same 149cc, single-cylinder engine that delivers 12.2hp of power and 13 ...

Whereas, the Yamaha MT 15 BS6 is more than just the R15 v3 ... Which bike is cheaper Yamaha FZS-FI V3 vs Yamaha R15 V4? The yamaha fz s fi version 3 is cheaper than Yamaha R15 V4 by Rs.