Was wondering the same thing about the knee in the breather. Did you extend the floorboards??
Howie
Appreciate the comments, thank you.
In relation to the heavy breather, apart from performance issues it is far better than the stock and my knee doesn't touch it. In fact, it gave me more leg room on the RH side because it is positioned approx 4" more forward than the stock air cleaner. I'm very happy with the set up.
I had extenders made which move the boards out 2" and fwd 1" but I find now with the heavy breather I don't have to be out as wide. I may go back to the Kuryakyn 4588. Still toying with those bits but with highway pegs (I ride with my heal on the board and toes on the pegs) I'm not overly fussed either way. Only problem with the extenders I made is that I live in a mountainous area and with 2" wider I don't think I'll have any boards left unless I learn to corner upright. Unless you're over 6' or so, I don't think you would have to worry about extenders, certainly not to take your boards wider.
The big test will be at the end of this month. Big trip - approx 4,000 miles round trip. I'll be putting leather softener on both my seat and my arse.