Easy to tune variator from Top Racing. The variator can be used with original belt. Supplied with unrestricted drive boss and 3 sets high quality weights (16x13mm) 7.5g-5.5g-5.0g. This variator provides increased acceleration and top speed with very good build quality. Suitable for the following models: Aprilia Habana -1999 (Morini Engine) Benelli 491 RR 50 (03-) (Morini Engine) 491 RR Replica 50 (03-) (Morini Engine) 491 ST 50 (03-) (Morini Engine) Naked 50 AC (03-) (Morini Engine) Pepe 50 (03-06) (Morini Engine) Derbi Vamos 50 Hyosung SB 50 Cab / Gamma 97- SB50G SB 50 M Supercab 06- KM4CA12 SD 50 Avanti SF 50 99-04 KM4CA14A7 SF 50 B Racing 05- KM4CA14 SF 50 R Rally 05- KM4CA15 Italjet Formula 50 AC (Morini Engine) Formula 50 LC (Morini Engine) Torpedo 50 AC (Morini Engine) Velocifero 50 AC (Morini Engine) Malaguti Crosser 50 AC (Morini Engine) Suzuki AH 50 Address 92-95 CA1GA AP 50 95-99 CA1JA Estilete 50 Katana 50 AC -1999 Katana 50 LC -1999 Sepia 50 Zillion 50 LC -1999