One of my favorite old postings from this board is on the research a Captain did to confirm that the Rocket was intended to have a six speed transmission. There was mention of this in a pre-launch bike review, in late 04-early 05. He found something about the internal shift parts actually having a sixth gear locater in place. My hunch is the addition of a sixth gear might well have placed the top end speed beyond what the mother company felt appropriate.

I support the idea to have the option of selecting an economy tune or a performance tune. There are certainly times when I would gladly trade off access to all 140 hp in exchange for say 50-60mpg. Given the relatively low hwy idle speed of a 5 speed, adding an overdrive 6th gear might have the bike in the 1500 rpm range. A better option might be to suppress the spark to one or two cylinders under light load at stable speed and hopefully double hwy range. About the only way to improve mpg is to add Jardines and PCIII and gain about 20 MPH and was it 4mpg?