Depends:
DirtBikes They get a bath right when when they get home, a dry-off ride, float-bowl drain, then a WhaleCum (Amor All) rubdown, WD40 on all-non-plastics, chain lube, air-filter visual, then a thank you.
RoadWarriors They get a WhaleCum rubdown BEFORE every ride, and a bath AFTER a ride like this weekend ...
... which occur often enough for the thing to get 2 - 3 baths a year.