G31-M Centurion

Name:

G31-M Centurion
Type:

G31-M

From:

 1970 - 1971

GENERAL Note, all data for 1970 G31-M until more info have been collected. 

Model Kawasaki Centurion
Category Cross

ENGINE

Type 2 stroke, single cylinder,  air cooled
Displacement 99 ccm   (6 cu. in)
Bore and Stroke mm (in.) 49.5 X 51.8 mm  (1.95 in. x 2.04 in.)
Compression ratio 7.8:1
Valve system rotary disc valve
Fuel system Mikuni VM24mm
Ignition Flywheel magneto
Starting Kick
Lubrication Superlube Oil Injection

DRIVETRAIN

Transmission

Close ratio 5-speed, constant mesh, return shift. Shift pattern: N-1-2-3-4-5 bottom up

Final drive

Chain

Secondary ratio

 

Overall ratio  (Top Gear)

Primary ratio

 

Gear ratios:

1nd

28.55-1

2nd

19.48-1

3rd

15,78-1

4th

13.18-1

5th

11.61-1

Clutch

Wet, multi-disc, Manual

FRAME

Type

-
Caster -
Rake -

Wheel travel:

Front

 

Rear

 

Tyre:

Front

3.25-18 4PR

Rear

3.25-18 4PR

SUSPENSION

Front:

Type

Telescopic fork

Rear:

Type

Swing arm

Spring preload

Adjustable

BRAKES

Front:

Type

drum

Calliper

 

Rear:

Type

drum

Calliper

-

DIMENSIONS

Overall lengt mm (in.)

1915 mm 75.4 in

Overall width mm (in.)

840 mm 33.0 in

Overall height mm (in.)

1070 mm 42 in

Wheelbase mm (in.)

1280 mm 50.4 in

Ground clearance mm (in.)

247 mm 9.7 in

Seat height mm (in.)

-

Dry weight 

81 kg/ 178 lbs

Fuel capacity litre

6.5 liter 1.7 us gal.

PERFORMANCE

Maximum power

18.5 @ 10250 rpm

Maximum torque

9.75 ft-lb @ 9750 rpm
Performance
Note, all data for 1970 G4TR until more info have been collected. 
YEAR FRAME NUMBER ENGINE NUMBER COLOUR
1970 G31M G31-00001- G31E00001- Lime Green
1971 G31M     Lime Green
       
Source Kawasaki -ID guide 1965 -1975

 

 

F21M

 
 

Name/Year:

Model name: Produced From:
250 F21M F21M 1968-70

GENERAL

Model

Kawaskai F21M

Category

Cross

ENGINE

Type

2 stroke single cylinder, air cooled.

Displacement

238 ccm

Bore x stroke (mm)

70 x 62 mm.

Compression ratio

7.7:1

Valve/Induction System

Rotary disc valve

Fuel system

Mikuni VM26mm

Ignition

Magneto and coil

Starting

Kick

Cooling

Air

Lubrication

Superlube Oil Injection

Exhaust

1-1

TRANSMISSION

Gearbox

4 speed constant mesh

Primary drive

 
Primary reduction ratio  

Final drive

 

Gear rations

1

 

2

 

3

 

4

 

5

 

6

 

Final reduction ratio

 

Overall drive ratio

 

Clutch

Wet, multi-plate

CHASSIS

Frame type

Tubular

Wheel travel

Front

 

Rear

 

Tyre

Front

3.25-19 4PR

Rear

4.00-18 4PR

Caster (Rake)/Trail

-

SUSPENSION

Front

Forks

 

 

 

Rear

Shock

 

 

 

BRAKES

Front

Disc/Drum

Drum 5.1 x 1.1

Calliper

-

Rear

Disc/Drum

Drum 5.9 x 1.1

Calliper

-

DIMENSIONS

Overall length

 

Overall width

 

Overall height

 

Seat height

30.69 in.

Wheelbase

1330 mm, 51.60 in.

Ground clearance

 

Fuel capacity - reserve

 

Dry weight

98 kg.

PERFORMANCE

Maximum power

30 @ 7000 rpm

Maximum torque

 
Performance  

YEAR

FRAME NUMBER

ENGINE NUMBER

COLOUR

1969-70 F24-00001- 400001- Lime Green, Candytone Red
       
 


 

 

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          Last update:   10. februar 2011