Throttle bodies, when introduced proved to be a quantum leap of reliability, durability and performance when compared with carburettors. However, overhauling the throttle body assemblies is normal and necessary with the high mileage (kilometers covered).
Overhauling for reliability and aesthetics will be better served by replacing as many of the old, worn parts as possible - even new fasteners look better than the old dull or corroded items.
Other related parts listed below:
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?