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 |
|
|
|
|
|
| |
