THE SUZUKI FA50 WAS OFFERED FROM 1981 TO 1991. THE BIGGEST PURCHASES WERE FROM THE U.S. AND I BELIEVE FRANCE. THEY USED TO RACE THESE IN FRANCE AND I DO BELIEVE THEY USED TO OFFER A RACE VERSION OF THE FA50 IN EUROPE. MY FRIEND HAS A 1982 FA50 HE BOUGHT NEW FOR JUST UNDER $400.00 . HE STILL HAS IT AND I SERVICE IT FOR HIM, THE THING RUNS GREAT!!. AS FAR AS PERFORMANCE GOES, THE ONLY THING YOU CAN DO IS TO MILL YEAR HEAD TO RAISE YOUR COMPRESSION RATIO AND ADVANCE YOUR TIMING. YOU CAN ONLY MILL OFF SO MUCH ,NOT ALOT. CHECK YOUR FORMULA, CC's IS IMPORTANT ASWELL. YOU CAN ADVANCE YOUR TIMMING ON THESE THINGS ASWELL. HIS SCOOTER WITH HIS PAPER WORK IS AT ABOUT $1500.00.