For
Yamaha PW50 PW 50 Y-Zinger 1981-2009 Motorcycle
1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000
Air filter connect pipe inside diameter is appro 28mm-29mm
.