Santi, let me know how it works out for you ok?...If your new to gas engines the adjusting of them may seem a bit of a mystery. It's pretty straight forward for the most part. A key ingredient is when rapidly advance the throttle the transition should be smooth. When your running wide open do not lean the engine to get the last ounce of Umph. You can lean the top end until it starts to loose power (too lean) and then back it off until you have restored your best running and THEN.. back off just a tad more. That should do it for you. Hope this helps BobH.