Minarelli Yamaha MBK Malaguti 50cc 40.4mm 1st Oversize Piston Kit RMS 3Day2022 Aluminium 47mm bore Vespa GTS Aluminium 47mm bore 6 transfer ports 10 Fits Most 177 Kits Diameter: 40 BRAND MODEL CC YEARS CHASSIS APRILIA AMICO 50 1994 1994 HR APRILIA AMICO 50 1996 1998 HU010 APRILIA AMICO GL GLE 50 1993 1995 HU APRILIA AMICO LX SPORT CAT 50 1992 1993 GC APRILIA GULLIVER 50 1995 1998 LH000 APRILIA RALLY 50 1995 2003 MD000 MDH00 APRILIA SCARABEO 50 1993 1997 HS LE APRILIA SCARABEO 50 1998 1998 PF000 PF0100 APRILIA SCARABEO 50 1999 1999 PF0 PFG APRILIA SCARABEO 50 2000 2005 PFG00 TH000 APRILIA SONIC 50 1998 2007 PB000 TL000 BENELLI 491 GT 50 1998 1999 BA0102 BENELLI 491 ST 50 1999 2001 BA0102 BENELLI K2 50 1998 2001 BA0105 BETA ARK 50 AC 50 1997 2003 BS4C20 BETA ARK 50 AC 50 2004 2007 BS4C40 BETA ARK 50 LC 50 1997 2003 BS4C00 BETA EIKON 50 LC 50 1999 2003 BS5000 BETA QUADRA 50 50 1997 2001 BS3 ITALJET DRAGSTER 50 50 1998 2003 ZJTDRG000 MALAGUTI CENTRO BASE 50 1993 1994 36 MALAGUTI F10 RESTYLING EU1 50 2001 2002 48 MALAGUTI F10 RESTYLING EU2 2