Valve, Check

Replacement of the air filter element in line with the recommended service schedule will ensure your machine will not suffer a reduction in performance, as the throttle bodies try to cope with a dirty clogged up filter. It is worth while checking all the various components that make up the complete air-filter assembly for damage and wear - it is vital that the only air entering the engine is through the filter, not leaking in through failed seals or damaged components?
The various parts you may require are listed below:

17210MEJ980
17210MEJ980P
17210MEJ981
17225MFPD00
17225MFPN00
17228MEJ003
17230MFPN00
17231MEJ003
17235MEJ003
17238MEJ003
17238MW4003
17240MEJ720
17241MEJ003
17358KR8750
17542MFPN00
17554MB0000
32901MA1000
36132PH4671
36138PR7A01
36163PV0004
36627MN5000
37830MEL003
37880P05A00
84601HA7670
91303PK2005
934040601407
9350005014
935000501402
93500050140B
9391125420
9391125680
950024105000
950024125000
950032304731
950053511020
950053532020

Order all the items you require at the same time, new tube 17260MEJ003 plug 17370419700 clip-nuts 90312MT3000 & screws 91508MM5000 93500050140A for example, and still only pay the same single fixed price shipping charge.

Please be aware that this component may have other applications within the Honda model range, so Check the part-numbers you require are correct prior to ordering.