@yamdoot
I know .. I love fixing stuff but I have no clue what I'm doing. I hope I could stay with the mechanic but I have work no can't spend lot of time with them

@Shyam - 7k for work you mentioned is like he(mech) had a full blast 2nd Diwali on your courtesy.

From your description of the issue with regards to loud exhaust note and mileage.

Mileage? Immediate diagnose will be the carb for the jetting/tuning.
Loud exhaust note? Probably the silencer tube needs to be checked if the caps have been removed.
Apart from taking to mech, try going through thread on xbhp 2stroke section. That should give you good basic idea of issues, faced, how to identify and possible solution.

I shall try my best possible to help however, the mechanics in Chennai are not very different from one's captured and behind the bars! All are there to receive you and Cheat without hesitation! Unless you possess knowledge about RX, your bike and wealth will be their best compliment to the noble service they render.

These days, finding a mechanic trustworthy is something hard to come.

I though so ... When mechanic tell be this is not rite etc. I don't know if he is telling the truth. I'll go through the thread and see if I can find something.