Help nedded 
I've Khyber 1999 model... bht kam chali hui hai engine vise and everything is in 90% genuine condition. Lakin ek issue aya ye hai jab gari petrol per hou to signal per ya jab bhi 1st gear me pick karo toa gari accelerate krnay k bjaye ulta de-accelerate karti hai or ek dm band hojati hai lakin thori zaada race dekr bari mushkil say pick karti hai. Kya issue ho skta hai? Carburetor ki sb chezein b nayi dali hain lakin koi fark nai para. Guide krdein.
Only expert suggestions needed please.
