Honda CBR400F

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Honda CBR400 Fireblade
Also called CBR400RR Fireblade, CBR 400 RR Fireblade, CBR 400F, CBR400R, CBR400RR, CBR400F
Production 1983
Class Sportbike
Four stroke, transverse four cylinder, DOHC, 4 valve per cylinder.
Compression ratio 9.6:1
Ignition CDI
Transmission 6 Speed
Suspension Front: Telescopic forks
Rear: Swinging arm
Brakes Front: 2x discs
Rear: Single disc
Front Tire 100/90 -16
Rear Tire 100/90 -18
Seat Height 790 mm / 31.1 in
Weight 174 kg / 383.6 lbs (dry),
Recommended Oil Honda GN4 10W-40
Fuel Capacity 18 Liters / 4.7 US gal
Manuals Service Manual


The engine was a Air cooled cooled Four stroke, transverse four cylinder, DOHC, 4 valve per cylinder.. The engine featured a 9.6:1 compression ratio.


Power was moderated via the Wet multi-plate coil spring.


It came with a 100/90 -16 front tire and a 100/90 -18 rear tire. Stopping was achieved via 2x discs in the front and a Single disc in the rear. The front suspension was a Telescopic forks while the rear was equipped with a Swinging arm. The CBR400F was fitted with a 18 Liters / 4.7 US gal fuel tank. The bike weighed just 174 kg / 383.6 lbs.


Honda CBR400 Fireblade Honda CBR400 Fireblade Honda CBR400 Fireblade


Honda CBR 400F

In every way, the CBR400F Endurance surprises. It competes in a class filled with fierce sportbikes as uncompromising as a Ducati Pantah; yet the CBR is cushy and comfortable by comparison, without sacrificing anything but the last fraction of racetrack gives away 75 pounds to the Suzuki GSX-R, but is only marginally slower. With the CBR, Honda has mastered the trick of having the cake and eating most of it, too.

With that weight disadvantage, the CBR400F can't afford any power disadvantage as well. And although its air-cooled, 16-valve, inline-Four doesn't look special, new technology lurks inside the ordinary exterior, hinted at only by the REV acronym cast into the cylinder head. The REV system mechanically disconnects one inlet and one exhaust valve from each cylinder at low engine speeds, and sets them operating again at high rpm. This allows radical cam timing without killing low-speed power. On the road, the CBR engine with REV lives up to its promise. At low rpm the engine pulls at least acceptably, and even better than that if the standard of comparison is the original Honda CB400 Four. Then, at 8500 rpm, there's a leap in power that's almost two-stroke-like as all 16 valves go to work and send tfc CBR rocketing toward its 12,750-rpi redline. Amazingly, vibration is almos non-existant, with only a brief bit o buzzing between 5000 and 6000 rpm.

Handling on the CBR is solid, andi starts to feel slightly mushy am underdamped only at racetrack speed; Motorcycles that work better on tli racetrack don't ride as well as the CBR so the suspension is a very reasonaH compromise for street use.

The CBR' 16-inch front wheel and quick steerini geometry allow it to turn nimbly, bu without sacrificing stability. No wiggle or wobbles here. Sacrifice, in fact, is a word that's nd in the CBR's vocabulary. Its seat is so( and well-shaped, the riding position i sport-touring rather than pure sport, am the fairing keeps the wind blast off th rider's chest without bathing him in hea from the engine. The only discomfor comes from footpegs that are too closeti the seat, cramping taller riders after i few hours on the road. There's a lesson to be learned from thi CBR. It's that the last few percentagi points of performance are often purchased at a dear price. The CBR isn't tht quickest or best-handling 400, but it cai deliver performance approaching 558 class standards, and do it without pain.

Make Model Honda CBR 400F
Year 1983
Engine Type Four stroke, transverse four cylinder, DOHC, 4 valve per cylinder.
Displacement 399 cc / 24.3 cu-in
Bore X Stroke 55 x 42 mm
Compression 9.6:1
Cooling System Air cooled
Induction VE53
Ignition CDI
Starting Electric
Max Power 58 hp / 43.2 kW @ 12300 rpm
Max Torque 3.6 kgf-m / 26.0 lb-ft @ 11000 rpm
Clutch Wet multi-plate coil spring
Transmission 6 Speed
Final Drive Chain
Gear Ratio 1st 2.769 2nd 1.850 1.850 3rd 1.478 1.478 4th 1.240 1.240 5th 1.074 1.074 6th 0.965 0.965
Front Suspension Telescopic forks
Rear Suspension Swinging arm
Front Brakes 2x discs
Rear Brakes Single disc
Front Tire 100/90 -16
Rear Tire 100/90 -18
Seat Height 790 mm / 31.1 in
Dry Weight 174 kg / 383.6 lbs
Fuel Capacity 18 Liters / 4.7 US gal