Hello I have an aprilia sr 50 www and have made a stage 6 per replica on it but the scooter does not pull I now have a black clutch pedal of malossi spring inside which coupled in at 7500 revolutions and a wise counterpressure spring inside have already tested the black and blue so 2000, 1500. when I install everything and start driving the suit is at the beginning very good but then when I briefly walk off the gas it does not come to speed and hardly accelerates any more and I we Is not what I could still try If you have ideas it will be very helpful