Hi, I have at present a Yamaha SZX (2011). It's a good bike in excellent condition, except fuel consumption. My bike gives around 35 kmpl though I generally drive at 40 - 50 kmph & don't use clutch & brake without necessity. Now that I want to cha

Hi, I have at present a Yamaha SZX (2011). It’s a good bike in excellent condition, except fuel consumption. My bike gives around 35 kmpl though I generally drive at 40 - 50 kmph & don’t use clutch & brake without necessity. Now that I want to change the bike, the Yamaha dealer is saying that the SZ RR is giving 50 kmpl. But I don’t see much difference between the two (SZX & SZ RR) at a glance. He says it has the Blue core Engine that makes the difference. Now, my question is, is there really any substantial difference ? Please help me.

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