These are the same as your cap. The number has changed over the years so it's a little harder to track down if you are using the original Honda part # because it no longer exists in the system. Currently, it is 17620-460-067. Maybe you are using another #? Anyway, here ya go. Good luck.
I see most Honda dealers have them for $43.95 but Honda Parts Nation has them for $32.96. They usually are cheaper for the part but you may get better overall pricing depending on what the shipping cost is from the other guys out there. I wouldn't buy a generic one. They rarely fit like the original. The proper venting and fit are really important for good flow to the carbs and also considering that's not exactly a small amount of gas you have between your legs there.
CB1000C A (83) MOTORCYCLE, JPN, VIN# 1HFSC100-DA000001 TO 1HFSC100-DA007620
CB125S A (84) MOTORCYCLE, BRA, VIN# 9C2JC130-ER010001
CB125S A (85) MOTORCYCLE, BRA, VIN# 9C2JC130-FR100001
CB125TT A (90) MOTORCYCLE, JPN, VIN# JH2JC063-LK000001
CB450SC A (82) MOTORCYCLE, JPN, VIN# JH2PC054-CM000015 TO JH2PC054-CM019266
CB450SC A (83) MOTORCYCLE, JPN, VIN# JH2PC054-DM100001 TO JH2PC054-DM102503
CB450SC A (85) MOTORCYCLE, JPN, VIN# JH2PC054-FM300005 TO JH2PC054-FM307113
CB450SC A (86) MOTORCYCLE, JPN, VIN# JH2PC054-GM400004
CB650 A (80) MOTORCYCLE, JPN, VIN# RC05-2100002 TO RC05-2108005
CB650 A (81) MOTORCYCLE, JPN, VIN# JH2RC050-BM200001 TO JH2RC050-BM207746
CB650 A (82) MOTORCYCLE, JPN, VIN# JH2RC050-CM300003
CB650C A (80) MOTORCYCLE, JPN, VIN# RC05-2000008 TO RC05-2018218
CB650C A (81) MOTORCYCLE, JPN, VIN# JH2RC051-BM100001 TO JH2RC051-BM118458
CB650SC A (82) MOTORCYCLE, JPN, VIN# JH2RC080-CM000013 TO JH2RC080-CM019135
CB750C A (80) MOTORCYCLE, JPN, VIN# RC01-2200004 TO RC01-2220040
CB750C A (81) MOTORCYCLE, JPN, VIN# JH2RC011-BM100001 TO JH2RC011-BM125225
CB750C A (82) MOTORCYCLE, JPN, VIN# JH2RC011-CM200003 TO JH2RC011-CM206708
CB750SC A (82) MOTORCYCLE, JPN, VIN# JH2RC012-CM000019 TO JH2RC012-CM012103
CB750SC A (83) MOTORCYCLE, JPN, VIN# JH2RC012-DM100001 TO JH2RC012-DM102116
CB900C A (80) MOTORCYCLE, JPN, VIN# SC04-2000046 TO SC04-2015593
CB900C A (81) MOTORCYCLE, JPN, VIN# JH2SC040-BC100004 TO JH2SC040-BC119900
CB900C A (81) MOTORCYCLE, USA, VIN# 1HFSC040-BA100004 TO 1HFSC040-BA119900
CB900C A (82) MOTORCYCLE, USA, VIN# 1HFSC040-CA200101 TO 1HFSC040-CA214339
CBX A (81) MOTORCYCLE, JPN, VIN# JH2SC060-BC300004
CBX A (82) MOTORCYCLE, JPN, VIN# JH2SC060-CC400001
CM250C A (82) MOTORCYCLE, JPN, VIN# JH2MC060-CK000067 TO JH2MC060-CK017891
CM250C A (83) MOTORCYCLE, JPN, VIN# JH2MC060-DK100009 TO JH2MC060-DK106422
CM400A A (81) MOTORCYCLE, JPN, VIN# JH2NC020-BM200001
CM400C A (81) MOTORCYCLE, JPN, VIN# JH2NC012-BM000001
CM400T A (81) MOTORCYCLE, JPN, VIN# JH2NC010-BM200001
CM450A A (82) MOTORCYCLE, JPN, VIN# JH2PC052-CM000001 TO JH2PC052-CM004281
CM450A A (83) MOTORCYCLE, JPN, VIN# JH2PC052-DM100001 TO JH2PC052-DM102003
CM450C A (82) MOTORCYCLE, JPN, VIN# JH2PC051-CM000001 TO JH2PC051-CM011076
CM450E A (82) MOTORCYCLE, JPN, VIN# JH2PC053-CM000001 TO JH2PC053-CM012034
CM450E A (83) MOTORCYCLE, JPN, VIN# JH2PC053-DM100001 TO JH2PC053-DM103228
FL350R A (85) FL MODELS, JPN, VIN# JH3TE020-FC100015
GL500 A (81) MOTORCYCLE, JPN, VIN# JH2PC020-BM000022 TO JH2PC020-BM007550
GL500 A (82) MOTORCYCLE, JPN, VIN# JH2PC020-CM100001
GL500I A (81) MOTORCYCLE, JPN, VIN# JH2PC021-BM000007 TO JH2PC021-BM004396
GL500I A (82) MOTORCYCLE, JPN, VIN# JH2PC021-CM100001
GL650 A (83) MOTORCYCLE, JPN, VIN# JH2RC100-DM000004
GL650I A (83) MOTORCYCLE, JPN, VIN# JH2RC101-DM000015
VF500F A (84) MOTORCYCLE, JPN, VIN# JH2PC120-EM000018 TO JH2PC120-EM007149
VF500F A (85) MOTORCYCLE, JPN, VIN# JH2PC120-FM100001 TO JH2PC120-FM107254
VF500F A (86) MOTORCYCLE, JPN, VIN# JH2PC120-GM200001 TO JH2PC120-GM202293
VF500F AC (85) MOTORCYCLE, JPN, VIN# JH2PC121-FM100001 TO JH2PC121-FM101566