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 1976 KZ 400 Standard

Identification    
 Letter designation    D3
 Color     Diamond blue, Diamond copper
 Frame #    Lincoln, NE: K4-506001 ~ , Akashi: K4-044601~
 Engine #    Lincoln, NE: K4E051559 ~ , Akashi: K4E050601~
     
Dimensions    

 Overall length

   2,080 mm

 Overall width

   810 mm, EU: 775 mm

 Overall height

   1,120 mm, EU: 1,050 mm
 Wheelbase    1,360 mm, EU: 1.370 mm
 Road clearance    125 mm
 Dry weight    170 kg
 Fuel tank capacity    14 l
     
Performance     
 Climbing ability    24°
 Braking distance    13.5 m from 50 kph
 Minimum turning radius    2,300 mm
     
Engine     
 Type    SOHC, 2 cylinder, 4 stroke, air cooled
 Bore and stroke    64 mm x 62 mm
 Displacement    398 cc
 Compression ratio    9.4
 Maximum horsepower    36 hp @ 8,500 rpm
 Maximum torque    3.3 kg-m @ 7,500 rpm
 Valve timing    

Inlet

 

Open

Closed

Duration 

 26° BTDC 

 74° ABDC 

 280°

Exhaust

 

Open

Closed

Duration 

 68.5° BBDC 

 31.5° ATDC 

 280°

 Carburetors    (2) Keihin CVB36
 Lubrication system    Wet sump
 Engine oil Type 

 SAE 10W40, 10W50, 20W40, 20W50

  Capacity  2.6 l, 3.0 l total incl. filter 
 Starting system    Electric starter and kick 
 Ignition system    Battery and coil
 Cylinder numbering method    
 Firing order    
 Ignition timing    From 10° BTDC @ 1,100 rpm to 40° BTDC @ 2,800 rpm
 Spark plugs    ND W24ES or NGK B8ES
     
Transmission     
 Type    5-speed, constant mesh, return shift
 Clutch    Multi-disc, wet
 Gear ratio 1st   2.571
  2nd  1.684
  3rd  1.273
  4th   1.040
  5th   0.889
  6th   -
 Primary reduction ratio    2.435
 Final reduction ratio    3.000, EU: 2.933
 Overall drive ratio    6.493, EU: 6.348
   
Electrical equipment     
 Alternator    Nippon Denso 021000-3560
 Regulator/rectifier    Nippon Denso 026000-2490
 Ignition coils    Nippon Denso 029700-3430
 Battery    Yuasa 12N 12A-4A-1 (12V 12AH)
 Starter motor    Mitsuba SM242
 Headlight Type   Sealed beam, EU: Semi-sealed
  Bulb   12V 50/35W, EU: 12V 35/35W
 Tail/brake light    12V 8/27W, EU: 12V 5/21W
 City light    12V 4W
 Turn signal lights    12V 23W, EU: 12V 21W
 Meter lights    12V 3.4W
 Indicator lights    12V 3.4W
 Horn    12V 2.5A
     
Frame     
 Type    Tubular, double cradle
 Steering angle    41° to either side
 Castor    27°
 Trail    102 mm
 Tire size Front   3.25 - 18
  Rear   3.50 - 18
 Suspension Front   Telescopic fork
  Rear   Swing arm
 Suspension stroke Front   135 mm
  Rear   80 mm
 Front fork oil Type   SAE 5W20
  Capacity   155 ~ 165 cc each fork
  Oil level 
     
Brakes     
 Type Front   Single disc
  Rear   Internal expansion, leading-trailing
 Effective disc diameter Front   277 mm
 Brake drum inside diameter Rear   180 x 30 mm

 

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The Super Four

Short clip from the Z1 movie with Micky Hesse. In September 1972, the Z1 was introduced to the U.S. public, and sales started in November of that year.