There is a set of non-viton o-rings in the football, but I bought the viton o-rings from Red-Eye.
Re running lean, is that from looking at spark plugs?
My orings came in today. Yes when we pulled the plugs it showed that 4 were running lean.
I doubt that very much that it's caused by your jets. At that rpm your throttle should only be a little more than 1/8 turn open. Needles and pilot screws adjustment can/and will have a biggest impact. Main jets don't come into play past 1/3 open throttle. Personally I found that my bike with a clean air filter, everything stock(exhaust, jets etc) my bike runs every much on the rich side especially in this hot weather we are having. Using an CO2 exhaust gas analyzer I found that my trouble was with #2 and #6 idle jet adjustment screws. After replacing and adjusting I have gotten my best MPG in a while. 37.6 MPG on a full tank (218 miles with 5.8 gallon).
I am saving up kitchen passes (World famous Rainmaker quote) for my InZane trip. I would be more than happy to test your bike make some adjustment if neccesary, but you would have to come to Dublin, TX . PM me if your interested.