I already have the 906's w/ heavy springs/dampers. The aluminum heads are just a little rich for my blood at the moment.

Also, the engine ran strong with the 700cfm right up to 6500. At the suggestion of a friend, I tried both a 750 & 850, and after tuning them both, I found the larger carbs were not as responsive, and there was really no diff in the et's, so I went back to the 700.