Hi, I drive a Yamaha rd 50 mx (actually an 80s that just got a 50s cylinder on it and another pott to throttle it (written from 80s to 50s)). Unfortunately, it only drives a limp 45-47kmh and has a middle train. What can I do to get it faster so 55kmh-60kmh. I already had the 80ccm on it but it is too striking of the sound and it was too fast (86kmh). I just need a good train and a few kmh more. I’ll do it? I already got tips that I should put a sports pot on it (or just the 80’s exhaust to the 50’s), other tuning ass and carburettor that’s true? I already got a 16 or 17 standart carburettor on it even bigger I don’t think for the 50ccm. Please write me all your tips (if I have to buy what I want to buy today).