Have a 1987 1100 sporty, I'm taking the air filter off and putting on a round one. The breather tube from crankcase goes into the original air filter through the rear of filter housing. Don't they make a small air filter that I can attach directly therefore eliminating the rubber tube all together? If so, which one should I get? Does it have to be Harley? It would have to be rather small to be mounted directly. Also thinking about putting on a single seat, I like the Bobber, old-school look. Any suggestions about comfort, spring type, price, anything so I could make a smarter decision would be appreciated. Thanks everybody.