The story is simple. This year the new Ultra has a new wire harness, new ECU and a knock sensor who messes up everything. So what you need to get from 66-68mph to a solid 75+ is the following parts from R&D: The reprogrammed ECU (R2 or R3), the brand new ride plate and aquavein intake grate, the adjustable block off valve and the R&D pro pitch 14/19 impeller. Then you go on the water and test on a full tank to verify the 75+mph. Call R&D for price and availability of the parts above.
