#10 is the air horn/cover. It helps keep water from filling the air filter box. #11 is a screen to keep small animals from nesting in the filter cavity.
The breather hose on the cam cover attaches to #24
Neither #18 or #23 are ordinary hoses. #23 has an end cap with a slit in it. You pinch this at service intervals to drain water collected, yet it still block air ingress.
#18 is a reduced diameter tube, whose open outlet is about 1/8 inch. Enough to drain gas overflow, yet limit air ingress.
All the tubes with free ends, route behind the engine and in front of the swing arm pivot.
Cheers,