sorry for you mate..
i've used number of bikes . so still u dont know that most of authorised dealers use untrained laborours, for cheap salary. so they no nothing other than washing it and change engine oil, probably some break pad change.
real eingeneer is not there always. specially with AMW.
so u really want to check up,,? there are learned , experienced guys around colombo. you know nothing abt bikes.
also noth that fuel consumption depends on various facts.
rider weight, acceleration, tyre pressure, average speed, frictional coefficient of road, and lubricants.
probably u can get that 40kmpl due to several reasons.
1 - ultra smooth ride with no acceleration ( sell ur fz and buy ct100 )
2 - use of premium petrol (octane 95+)
3 - high tyre pressures than recomended ( result radial ware of tyre)
4 - still under 1500 km odo and speed under 50kmph (new bike ah?)
5 - u are 50kg male with kwoshiyokor disease. ( wadipura kapan)
6- ur speedo or odo may faulty (yamaha FZ is famous for that fault)
7 - U are glorified liar abt 1St bike. (its normal until others know,than u are mad)
so I and my friends have several FZand FZS too. all the same story,
we do experience the fun of that acceleration without bothering ur 40kmpl.
thin u got the point..
be a man..
bike is a tool and use it as so, don't live for bike.
reev it, you'll feel it.....
if still not confident,.....
wear a saree.............
thanks