Hi I am sagar. I have bajaj 135dtsi bike . this bike age are 6years. but engine are same as new condition . the bike also run 82000km. still the milage of the bike are 55 above and the top speed are 110km per hr. , clutch plate , timing chain , valve are not changing.I ride this bike in the hilly terrain of Darjeeling and Sikkim where it needs full pick up to maintain the rhythm of the ride. It does great. This bike is very suitable for high altitudes. It gives me 54 kms. in 1 ltr. What else do I need from my lovely bike. Thanks Bajaj for such a lovely creation.