empty tank before filling if possible or see how much is there , record how much you fill every time for this whole period , drive normally as trafic & conditions permit . once you have reached at a stage where remaining petrol is equivalent to last recorded one you can just get differnce in odo / no of liters filled , this will give you real drive mileage with all wastages evaporations included , mine got 54 KPL ( hot climate presently)in any driving condition
45 seems low as per GS standard even under rash drive, drive at upper gears as much as possible smoothly in eco mode . 60 KPL is doubtfull but achievable.
I believe as some one indicated that this bike adapts riding style of the rider.
Drive safely , love thy your byke.
rgds,



.
GS(Suzuki's cool marketing
).

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