Concerned about engine become too hot. Review on Suzuki GS150R

I have taken this bike before 2 months and completed 580km yrt, after reading reviews in mouth shut,

the bike is nice, but my bikes engine become too hot if I ride it for 6-7 km also,

i test drive it for 50 km one day, observed the same , is there any problem with my bike, anybody can please suggest over this, 1st service is done in last month, service centre people told me that new bike become hot upto 1000 km, I am driving it in range of 40km-55 km  in city,

in my apartment one guy taken same gs 150r with me, I cross checked with him but my bikes engine become hot almost double than his bike for same distance. I am concerned about my bike if I go to pune it is 220 km from Mumbai, is there any chances of locking the engine or piston.. can anybody give me suggestion.. over this.

Regarding riding comfort level I am satisfied, I have to ask one question , there are 2 modes in this bike eco and power, I set eco mode on console, but in many reviews it is written to pull throttle of bike in eco mode,

what is this throttle , and where I can find this, what changes I have to made for throttle in eco mode, my bike run smoothly on 3rd gear, I tested it  on highway and touched 80km , on sixth gear, but I didn't find sixth gear as mentioned in other reviews that they feel like sitting in cockpit, or experience like riding on ice cream, some vibrations are there on sixth gear, I didn't find it very smooth for sixth gear..

I am very impressed by review on mouthshut about its sixth gear experience, but I didn't find it as written in review. Can anybody give me information about throttle shifting in eco mode..

Overall I like this bike except these issues.

Thank you,