Kuch bhi nahi kartey as I went for tuning at first 1500km and he didn't even touch carb settings and when I inquired him that why he didn't so, he replied that this is the best setting already set by yamaha and we do not recommend to change its adjustment and would you believe me that I was getting fuel average of 50 and my bike was touching 110 easily.
Now my bike has done 3200 km total so far but I am not getting performance like before so I will visit yamaha service centre soon to troubleshoot the issue.
You're saying that exhaust valve should rot be adjusted and you might be right mate but one bastard just did that valve adjustment too.