Honda shine is good mileage bike in 125cc bikes sector I am using this bike since 2012. The bike gives 60kms mileage and is very smooth.this bike is better than hero glamour in terms of durability.
If you plan to buy a bike in future I suggest you Honda company bikes . I am giving some suggestions to improve bike mileage
1.drive the bike in steady speed
2.dont go more than 60kms speef
3.use gears correctly
4.maintain the bike services in honda show room only.
5.maintain the correct tire pressure