Depends on the kind of CB900 you got.. There was a "C" version, which is the custom (or cruiser) styled version, and then there is the "F" version, which is the sport version. The C is the one that had the dual-range tranny. I don't know anything more about the trans than that.. I owned a 1982 CB900F, and loved it. I'm not sure, but I beleive the C version might of had shaft drive? The F was chain drive, triple disc brakes, and had an oil cooler..