The Honda CB750 Four K is a classic motorcycle from 1969 with a four stroke, transverse four cylinder, SOHC, 2 valve per cylinder engine and a capacity of 736cc. It has a compression ratio of 9.0:1 and is air cooled with 4 x 28mm Keihin carbs for induction. The ignition is powered by a battery and coils, and starting can be done electrically or via the kick. It can produce a maximum power of 50kW / 67hp at 8000rpm and maximum torque of 44lb-ft / 60Nm at 7000rpm. The transmission is 5-speed with a multi-plate, wet clutch and a chain final drive. The frame is a tubular steel duplex cradle with telescopic forks in the front suspension and a swingarm, dual shock suspension in the rear – preload adjustable. It has a single 296mm front brake disc and a 179mm rear brake drum with a front tyre size of 3.25-19 and a rear tyre size of 4.00-18. The Honda CB750 has a wheelbase of 1453mm / 57.2in and a seat height of 800mm / 31.5in. It has a wet weight of 226kg / 499lbs, a fuel capacity of 18.2L / 4.8 US gal and an oil capacity of 3.3L / 7 US pints. The average fuel consumption is 6.9 L/100 km / 14.6 km/l / 34.3 US mpg with a braking distance of 10m / 32.9ft at 48km/h / 30mph and 41m / 135.7ft at 97km/h / 60mph. It can reach a top speed of 198 km/h / 123.2 mph and has a standing 1/4 mile time of 13.5 sec / 100.9 mph. The Honda CB750 Four K manual can be found on Honda4fun.com or Cycle World.
Technical specifications:
Make Model: Honda CB 750 Four K
| Year | 1969 |
|---|---|
| Engine | Four stroke, transverse four cylinder, SOHC, 2 valve per cylinder. |
| Capacity | 736 cc / 44.9 cub in. |
| Bore x Stroke | 61 63 mm |
| Compression Ratio | 9.0:1 |
| Cooling System | Air cooled |
| Lubrication | Dry sump |
| Induction | 4 x 28 mm Keihin carbs |
| Ignition | Battery, coils |
| Starting | Electric, kick |
| Max Power | 50 kW / 67 hp @ 8000 rpm |
| Max Torque | 44 lb-ft / 60 Nm @ 7000 rpm |
| Clutch | Multi-plate, wet |
| Transmission | 5 Speed |
| Final Drive | Chain |
| Gear Ratios | 1st 13.99 / 2nd 9.54 / 3rd 7.45 / 4th 6.14 / 5th 5.26:1 |
| Frame | Tubular steal duplex cradle |
| Front Suspension | Telescopic forks non adjustable. |
| Rear Suspension | Swingarm, dual shocks, preload adjustable. |
| Front Brake | Single 296 mm disc |
| Rear Brake | 179 mm Drum |
| Front Tyre | 3.25-19 |
| Rear Tyre | 4.00-18 |
| Wheelbase | 1453 mm / 57.2 in. |
| Seat Height | 800 mm / 31.5 in. |
| Ground Clearance | 160 mm / 6.3 in. |
| Wet Weight | 226 kg / 499 lbs |
| Fuel Capacity | 18.2 L / 4.8 US gal |
| Oil Capacity | 3.3 L / 7 US pints |
| Consumption Average | 6.9 L/100 km / 14.6 km/l / 34.3 US mpg |
| Braking Distance 48 km/h / 30 mph – 0 | 10 m / 32.9 ft |
| Braking Distance 97 km/h / 60 mph – 0 | 41 m / 135.7 ft |
| Standing 1/4 Mile | 13.5 sec / 100.9 mph |
| Top Speed | 198 km/h / 123.2 mph |
| Manual | Honda4fun.com, Cycle World |
