Honda CB400F
After introducing the four-cylinder string of lighter fours featuring engines as small as 350 cc (CB350 Four, CB500 Four), and this 408 cc Four.
4into1.jpg For the most part, the CB400F was simply an upgraded version of the 350 model from the previous year. The most striking change was the swoopy four-into-one exhaust system that snaked around the frame, converging into a single muffler on the right side of the bike. Also noticeable were the angular fuel tank and flat cafe-style handlebars, all of which gave the bike a more racer-like look and feel than the rather pedestrian 350.
Although aimed at the sporting segment of the market, the CB400F came up a little short in the performance department compared to the competition, most notably the quick but noisy two-stroke triples from Kawasaki. But whatever the CB400F engine lacked in power it made up for in refinement, the small-displacement four-stroke being smooth and less audibly irritating than a two-stroke. To help keep the engine in its power band, Honda employed a six-speed transmission—something of a rarity at the time.
It should also be noted that the CB400F was a very successful motorcycle in club or privateer racing. Kaz Yoshima and other racers were able to take Honda's little 408cc engine up to 490cc and with the addition of other racer options, this small bore was considered a 'giant killer'.
See Also
| Engine | 408cc transverse four |
| Bore & Stroke | 51mm x 50mm |
| Compression Ratio | 9.4 : 1 |
| Carburetors | Four 20mm Keihin (piston valve) |
| Ignition | Kettering- coils, points, and condensors |
| Starter | Kick and Electric |
| Transmission | Six Speed |
| Wheelbase | 53.3 inches (1355mm) |
| Seat Height | 31.1 inches (790mm) |
| Fuel Capacity | 3.7 gallons, including 0.88 gallon reserve |
| Wheels | 18in. Spoke Type |
| Tires | Front: 3.00S - 18 tubed
Rear: 3.50S - 18 tubed |
| Brakes | Front: Single disc
Rear: Drum |
| Weight | Dry: 375 pounds (170 kg)
Wet 390 pounds (178 kg) |