Honda CB 400T Hawk

   

Make Model

Honda CB 400T Hawk

Year

1978

Engine

Air cooled, parallel twin cylinder, SOHC, 3 valve per cylinder

Capacity

395
Bore x Stroke 70.5 x 50.6mm
Compression Ratio 9.3:1

Induction

2x 32mm Keihin carbs

Ignition 

CDI 
Starting Electric & kick

Max Power

43 hp @ 9500 rpm

Max Torque

3,4 kgf-m @ 8000 rpm

Transmission 

6 Speed 
Final Drive Chain

Front Suspension

Telescopic forks, 124.5mm wheel travel

Rear Suspension

Dual EVO dampers with 5-way spring preload adjustment. 96.5mm wheel travel

Front Brakes

Single 282mm disc

Rear Brakes

153mm Drum

Front Tyre

3.60 S19

Rear Tyre

4.10 S18

Wet-Weight

177 kg

Fuel Capacity 

13 Litres

Having introduced the first four-cylindered motorbikes for the 350; 400; 500; 550 and 750 -classes, Honda seemed to take a step back with this parallel twin with classic 360° crank-layout. Nevertheless the engine  showed to be reliable and sturdy and was to be a long living design used in all Honda's 400 & 450 twins for the next 10-15 years.

The distingtives of the engine, beside of the 360° crank, is: Heavy  oversquared cylinder-layout; 3-valve design of the combustion chamber,  tandem balance-shafts in the front left side of the engine and CDI ignition.
Beside of this, during time, almost classic engine, the CB400T also  introduced  the so called "Com-Star" compound aluminium-rims, using tubeless tyres for the first time - This together with the other models  of same year mounted with the remarkable Com-Star rims!

The rather stubby design of the CB400T changed when Honda short after  introduced the new "Euro-line" -design with the CB900 Bol d'Or. In the  meantime it was launched in a version with the same design as the CX500  Costum: The CM400.
Later was the engine changed to 450ccm in the hunt for bigger torque,  meanwhile the power remained the same. As for the 400, the 450 also  showed up in several bike-designs during time!

Source Kim Nielsen