bhai no matter where u get it tuned from , the bikes speed will decrease with a pillion on board, the acceleration and top speed wil be different while riding single and when with a pillion.secondly i would advise u not to put extra weight on the bike , for eg the safeguard u installed , though its for safety but still.and a lot depends on the flow of air also , when u r going against it u wont be a able to gain good speed but if its the other way round ull see that the bikes performs better.dont go to mechanics bro , tunning is not needed for these kind of bikes at such early stages , my mechanic told me that my bike needs tunning and then it'll give me a mileage of 45km/ltr , but all in vain , the bike still is at 40km/ltr.u can have ur tappets checked by the way
