^^thts cos i dont see much difference in the mileage of 100cc n 150cc bikes...they usually give around 60 kmpl....
plus imho, 150cc bikes are the right blend of performance and mileage..below it, performance suffers at the hands of mileage n above 150cc mileage suffers at the hands of performance...
.....
Just see the equation...
Below 100 cc - Scooty type bikes - 45-55 kmpl
100cc-125cc - All breeds of splendors, victors, platina, discover etc. - 60-70 kmpl
150cc - Unicorn, Pulsar 150, Xtreme etc. -50-60 kmpl
>180cc - Pulsar 180, 200cc, Karizma etc. - 30-40 kmpl
So you see...the logical option for performance n mileage seems to be 150cc...