FITS TO:

Aprilia
Amico 50cc AC (1991 - 1992), Amico 50cc ac (after 1993), Amico GL 50cc AC, Amico Sport 50cc AC, Area 51 LC, Gulliver 50cc AC, Gulliver 50cc LC, Rally 50cc AC, Rally 50cc LC, SR 50cc AC (1994 - 1997) - Minarelli horiz., SR 50cc AC (before 1994) - Minarelli vertical, SR 50cc LC (1994 - 1997) - Minarelli horiz., SR 50cc Netscaper LC - Minarelli horiz., SR 50cc Stealth LC - Minarelli horiz., SR 50cc WWW AC (after 2000) Minarelli engine, SR 50cc WWW AC - before Minarelli engine, Scarabeo 50cc AC (after 1998), Scarabeo 50cc AC (before 1998) 

Benelli
491 50cc RR LC (before 2003) - Minarelli horiz., 491 50cc RR Replica LC (before 2003) - Minarelli horiz., 491 50cc ST LC (before 2003) - Minarelli horiz., K2 50cc AC - Minarelli horiz., K2 50cc LC - Minarelli horiz., Naked 50cc AC (before 2003) - Minarelli horiz., Pepe 50cc AC (before 2003) - Minarelli horiz. 

Beta
Ark 50cc AC - Minarelli horiz., Ark 50cc LC - Minarelli horiz., Chrono 50cc AC - Minarelli horiz., Eikon 50cc LC - Minarelli horiz., Quadra 50cc AC - Minarelli horiz., Tempo 50cc AC - Minarelli horiz. 

Buffalo
Fox 50cc AC - Minarelli horiz. CPI, Rex 50c AC - Minarelli horiz. CPI 

Italjet
Dragster 50cc LC, Pista 2 50cc AC, Pista 50cc AC 

KTM
Ark 50cc AC, Ark 50cc LC, Chrono 50cc AC, Go 50cc AC, Quadra 50cc AC, Tempo 50cc AC 

Kreidler
Florett 50cc AC 

MBK
Booster 50cc AC (1992 - 1999), Booster 50cc AC (after 2004), Booster Next 50cc AC (after 1999), Booster Next 50cc AC (before 1999), Booster One 50cc until 2013, Booster Rocket 50cc AC, Booster Spirit 50cc AC (before 2004), Booster Track 50cc AC, Flipper 50cc AC, MachG 50cc AC, MachG 50cc CAT LC (after 2003), MachG 50cc LC (before 2003), Nitro 50cc CAT LC (after 2003), Nitro 50cc LC (after 1999), Nitro 50cc LC (before 1999), Nitro Naked 50cc LC, Ovetto 50cc AC before 2008, Stunt 50cc AC, Stunt 50cc AC CAT (after 2004), Stunt Naked 50cc AC 

Malaguti
Centro 50cc AC, Ciak 50cc AC, F12 Phantom 50cc AC, F12 Phantom 50cc AC (after 2004), F12 Phantom 50cc LC, F12 Phantom 50cc LC (after 2004), F15 Firefox 50cc AC (after 2004), F15 Firefox 50cc LC, F15 Firefox 50cc LC (after 2004) 

REX (Jinan Qingqi, Shenke)
Escape 50cc AC, Rex 50cc 2-stroke AC (MK50), Silverstreet 50cc AC 

Yamaha
Aerox 50cc LC (after 1999), Aerox 50cc LC (before 1999), Aerox 50cc LC CAT (after 2003), Aerox Naked 50cc LC CAT (after 2003), BW's 50cc AC, BW's 50cc AC (after 2004), BW's Bump 50cc AC, BW's Easy 50cc 2013, BW's NG 50cc AC (after 1999), BW's NG 50cc AC (before 1999), BW's Spy 50cc AC, Jog R 50cc AC, Jog RR 50cc LC (before 2003), Jog RR 50cc LC CAT (after 2003), Neo's 50cc AC before 2008, Slider 50cc AC (before 2004), Slider 50cc AC CAT (after 2004), Why 50cc AC, Zuma 50cc AC, Zuma II 50cc AC