hello all. i have a malaguti f15 firefox. its got a 70cc stage 6 streetrace kit, xz exhurst, dellorto 17.5 carb, standard airbox, pollini carbon reeds, problem i got is when pulling off its not got much go in it till it reaches 10 mph then it just takes off, i have a 90 main jet in carb, and im running on 3 gram rollers, i will be very greatful for any info for this problem, many thanks mark..