Polini Racing Main Torque Spring for 50cc 2-Stroke Air-Cooled Minarelli Based ScootersSPECIFICATIONS: Original Spring Loading: 45/20mm/kgPolini Spring Loading: 45/28mm/kgSpring Thickness: 3.8mmSpring Length: 106mmInside Diameter: 46mmNumber of Turns: 6COMPATIBILITY: Aprilia – Amico 50 2T, Gulliver 50 2T, Rally 50 2T, Scarabeo 50 2T, SR mod. ’93-96Atala – Carosello 50 2TBenelli – 491 GT-ST 50 2T, 491 RR 50 2T, 491 Sport Racing 50 2T, K2 50 2TBeta – Ark Air 50 2T, Quadra Chrono 502 50 2T, Tempo 50 2TBSV – AX 50 2T, JX-GZ 50 2TCPI – Aragon GP 50 2T, Hussar 50 2T .’03, Popcorn 50 2T >’03Flyscooter – Hero 50 2TGarelli – Pony Racing SR 50 2TItaljet – Dragster 50 2T, Pista 92 50 2T, Formula 50 2T, Bazooka 50 2T, Yankee 50 2TKeeway – F-ACT 50 2T, Flash 50 2T, Arn 50 2T, Matrix 50 2T, Hurricane 50 2TKTM – K 50 2TMalaguti – Centro SL 50 2T, Ciak 50 2T, F10 50 2T, F12 50 2T ’00, F12 Phantom LC 50 2T, Yesterday 50 2TMBK – Booster 50 2T, Booster Next Generation 50 2T, Booster R-Rocket 50 2T, Boo