Air filter tubing

hello, im new to scooters.. im used to working with geared bikes.

Ive got a benelli k2 100 just for commuting, i've noticed that theres a long tube that goes from the front of the case to under the bellypan with an air filter on the end.
what the hell is it for? Can't i fit an angled air filter direct on the case? also why is it on the case and not the carb?

Thanks

 

thats for your transmission cooling mate

 

ahh.. can i stick any cheap air filter on it then?

 

Would it be ok to ditch the tubing and fit air filter direct to the case? just wondering as it would look cool, i think. lol

 

Well lots of people do it. They stick the little K&N type filter with a 45 degree elbow on it.