Take the part number from the 88 and change the last numbers of it to reflect the 90 jet. 99102-GHB-0880 change to 0880 to 0900
And according to cheap cycle parts here are other Hondas that take the same jet.
This part fits these vehicles:
┬╗ Honda C70 Passport 1981
┬╗ Honda CH80 Elite 80 1999
┬╗ Honda CH80 Elite 80 1997
┬╗ Honda CH80 Elite 80 1998
┬╗ Honda CH80 Elite 80 1994
┬╗ Honda CH80 Elite 80 2000
┬╗ Honda CH80 Elite 80 1993
┬╗ Honda CH80 Elite 80 1985
┬╗ Honda CH80 Elite 80 1986
┬╗ Honda CH80 Elite 80 1992
┬╗ Honda CH80 Elite 80 1989
┬╗ Honda CH80 Elite 80 1991
┬╗ Honda CH80 Elite 80 1987
┬╗ Honda CH80 Elite 80 1990
┬╗ Honda CH80 Elite 80 1988
┬╗ Honda CH80 Elite 80 1996
┬╗ Honda CH80 Elite 80 2004
┬╗ Honda CH80 Elite 80 1995
┬╗ Honda CH80 Elite 80 2002
┬╗ Honda CH80 Elite 80 2006
┬╗ Honda CH80 Elite 80 2007
┬╗ Honda CH80 Elite 80 2003
┬╗ Honda CH80 Elite 80 2005
┬╗ Honda CH80 Elite 80 2001
┬╗ Honda NH80 Aero 80 1985
┬╗ Honda NH80 Aero 80 1983
┬╗ Honda NH80 Aero 80 1984
┬╗ Honda TRX125 FourTrax 125 1985
┬╗ Honda TRX125 FourTrax 125 1987
┬╗ Honda TRX125 FourTrax 125 1988
┬╗ Honda TRX125 FourTrax 125 1986
┬╗ Honda XR80 1983
┬╗ Honda XR80 1981
┬╗ Honda XR80 1984
┬╗ Honda XR80 1982
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