Honda CBX

Sports motorcycle manufactured from 1978 to 1982
the six cylinder motorcycle made from 1978 to 1982

The Honda CBX sports motorcycle was manufactured by Honda from 1978 to 1982. With a 1047cc inline six cylinder engine producing , it was the flagship of the Honda range. The CBX was well received by the press, but was outsold by its sibling introduced in late 1979, the Honda CB900F.

Honda had produced a Honda RC series six cylinder race bike in the mid 1960s, but the CBX was Honda's first production 6 cylinder road bike with this GP racing engine technology. The CBX was given ventilated dual front brake discs due to the increased weight. The 1982 model CBX C model differed little from the 1981 model, having only some changes to paint and trim.

In the February 1978 issue of Cycle (magazine) editor Cook Neilson wrote this of a review of a pre production bike, after a four day review at Orange County Raceway, Willow Springs Raceway, and the Webco dynamometer: "The objective to build the fastest production motorcycle for sale anywhere in the world has been met." Comparing the CBX to the CB900F, Setright added,"The CBX feels better and goes better, and the difference is greater than the difference in price, so the costlier bike is actually the better bargain. The CBX engine is as responsive as a racer, the nicest cycle motor to ever reach the street.". The CBX was available on the market in late 1978, and the production model was even faster than the prototype. Cycle World got a tested 1/4 mile time of 11.64 seconds at , the 1978 bike was also the first bike they tested to go over But later CBXs with the addition of saddlebags and a fairing were detuned, and showed the 1981 CBX had lost five hp compared to the 1978 model, from 105 hp down to 100 hp. In 2011, Australian publication 2 Wheels Magazine named the CBX as one of their favourite 12 superbikes ever. To avoid confusion with Honda CBX series bikes, the CBX is sometimes referred to as the CBX1000.

In 1980, Frenchman Georges Martin of the French firm Moto Martin designed and built a lighter and stiffer nickel tube frame capable of controlling the CBX motor, and supplied this chassis in kit form. The original bike had handling issues if ridden hard and was heavy at The Moto Martin addressed the handling problems by creating a new rolling chassis. The new frame was stiffer and lighter than the original and the stock 37mm fork stanchions were replaced by 42mm versions in Moto Martin forks. A single, rear monoshock was mounted horizontally under the seat. With Brembo brakes and a one piece fiberglass tank/seat/tail section, the overall weight was reduced by
UK journal Motorcycle News listed the Martin CBX as third fastest in their table of road test statistics in 1980, with a top speed of , bettered by two different models of Dunstall Suzuki.