I have a 1999 model Green Suzuki Samurai. Was used very carefully and sedately by my dad from 1999 to 2011 and I started using it at the start of 2012. Its completely stock and since it was my dad's office commute, it did not clock too many kilometers from 1999 to 2011 - totaled around 33k on the odo when I started using it; while now its already 38.5k (since I ride min 60km daily).

Have serious issues with its mileage. Samurai was supposed to be a mileage 2-stroker, delivering around 60 kmpl, while mine under very very careful riding gives 47 and under normal riding gives 42 and ripping 37. Its a heavy drinker.

What needs to be fixed to get normal mileage of around 60 from this bike ?

I also wish to do something about its performance. Its a low revving bike (max power 7.49BHP @ 5500 RPM) but if something can be done to make it faster or pull better it would be great. Current top speed tested on Electronics City flyover is 85 and the whole bike vibrates like crazy at that speed and refuses to go faster.

My budget is small, around 5k so if I have to choose between mileage and performance I choose mileage since this is my daily commute.

PS: if it helps, I'm from Bangalore.