yr mujhe koi btaye ga alter 70 aur 125 mein rpm kese banate hein mere saaare doston k pas ek jaisi alter bike he carburator spoket simple bhagao to teeno bikein dum bna k chalti hein ek dusre ki likin jb woh rpm bnate hein to aage nikal jaate hein likin jb mein cutting krta hun to kisi ko aage aane nai deta likin unko bhi rpm sahi se banana nai ata guyz plz btao