m not pretty much sure
yaar aksar airfilter k edge ko tape laga ker uss k hole ko chota ker dete hain uss ko chek kerwao, clutch plate chek kerwao (engine may jahaa per setting hoti hay na clutch wire ki uss jaga) aur apnay tappets chek kerwao, aur cng ki setting kerwao. i think jaani tou chahiye 100kmph se 0oper,,,, aur bhi bht se reason ho saktay hain, like carbi setting or coil issue etc.
may b abhi new engine bana ho 2 months chalao uss ko pyaaar naaal phir may b koi farq paray
baaki pw k racers se poocho k vo kahaa se apni cars tunned up kerwatay hain...
aur yaar 100 bhi enough hay drive safe yaar,,,,, i dont remember i ever go above 80kmph