I m planning to buy a bike which have good fuel economy aleast 60 to 70 kmpl gud and stylish looks undr 100 to ,150 cc segment. overall a cool bike in all aspects

Hi, no 150cc bikes will give you mileage of around 60 to 70 kmpl. So better go for the stylish reliable Honda Twister. The bike has reliable 109 cc, Air-cooled, 4-stroke, single cylinder, digital CDi engine having 9 hp @ 8000 rpm of power and has 9 Nm @ 6000 rpm of torque and gives mileage of around 62 to 68 kmpl. Honda Twister is the bike of the year 2011 with rich advanced features and has good comfort in riding and handling and has good resale value.
you can also go for the Honda Shine with reliable 124.7cc, Air-cooled, 4-stroke, single cylinder, digital CDi engine with 10.3 hp @ 7500 rpm of power and has 11 Nm @ 5500 rpm of torque. The bike has mileage of around 58 to 65 kmpl depending upon the riding conditions and style and has good resale value. Honda Shine is regarded as the best 125cc bike in India with reliable engine and quality body parts and has good comfort in riding and handling.
So first test ride both the bikes and take a wise decision.

150cc bikes can give between 60-70kmpl but one has to ride extremely carefully to achieve such a figure. Since your overall concern seems to be mileage, you must go for a 100cc bike. The coolest bike in the 100cc segment that gives 60 to 70 kmpl is the Honda CB Twister, but it's the most expensive 100cc bike in India.. If you want to get great mileage and save maximum money off the buying price too, then you must go for the TVS Star Sport.