Kawasaki 90 GA1-A, 100 GA5-A, 90 GA2-A, 90 G3SS Riders Handbook
Foreword
Motorcycle Division
KAWASAKI HEAVY INDUSTRIES, LTD.
We wish to thank you for your choosing this fine Kawasaki Motorcycle. With the proper care and
maintenance you will find your ”dynamic partner” will go any time and anywhere. Please read this
handbook carcfully to obtain instuctions for proper use of your motorcycle, so that you can always
enjoy its best performance.
This handbook has been painstakingly reconstructed by D.A.S.ENgineering of Sweden to exactly
resemble the original. The variations of fonts, kerning and strange spacing are all fully intentional and
follow the original design.
Contents
Foreword .......................................................................... 1
1. Illustrations .................................................................. 4
2. Specifications ............................................................... 6
3. Stopping Distance and Passing Time ............................ 10
(Consumer Information)
4. Breaking In.................................................................... 13
5. Controls ........................................................................ 15
Fuel Tap .................................................................. 15
Starter Lever ........................................................... 15
Clutch Lever ........................................................... 16
Gear Change Pedal .................................................. 16
Brakes ..................................................................... 17
6. Starting the Engine ....................................................... 18
7. Parking ......................................................................... 19
2
8. Maintenance and Adjustments ................................. 20
Electrical System ................................................. 20
Carburetor ........................................................... 24
Control Cable ...................................................... 24
Brakes ................................................................. 26
Tires .................................................................... 27
Clutch .................................................................. 28
Drive Chain ......................................................... 29
Air Cleaner .......................................................... 30
Muffler ................................................................ 31
9. Tool Kit ................................................................... 32
10. Daily Checks ........................................................... 32
11. Periodical Inspection Chart ..................................... 33
12. Wiring Diagram ....................................................... 34
3
4
90 G3SS
5
100 GA5-A
90-SS GA2-A
90 GA1-A
Engine G3SS GA5-A
Type .................................. 2-stroke, rotary valve, single
cylinder, air cooled
Displacement ..................... 5.43cu-in (89cc.) 6.04cu-in (99cc.)
Bore X Stroke .................... 1.85X2.04in (47X51.8mm) 1.95X2.04in (49.5X51.8mm)
Comprcssion Ra.tio 7.0:1
Fuel ................................... Gasoline
Ignition ............................. Fly-wheel magneto
Ignition Timing ................. 20° Before TDC
Starting ............................. Primary Kick
Lubrication ....................... Superlube (Oil injection)
Engine Oil ......................... 2-stroke engine oil
Carburetor ......................... Mikuni VM19SC
Spark Plug ......................... NGK B-8HC NGK B-8HC
Performance
Max, Torque ...................... 7.10ft-lb (0.98kg-m)/7,000rpm 7.95ft-lb (1.10kg-m)/7,000rpm
Max. Speed ....................... 70mph (113kph) 70mph (113kph)
Climbing Ability ................ 27° 29°
Minimurn Turning Radius .. 71.0in (1,800mm)
Fuel Consumption .............. 171mi/gal@25mph 160mi/gal@25mph
(75km/l@40kph) (70km/l@40kph)
Transmission
Type .................................. 5-speed, constant mesh,
return shift
Clutch ................................ Wet multi-plate
Primary Reduction Ratio .... 3.52 (74/21)
Final Reduction Ratio ........ 2.64 (37/14) 2.57 (36/14)
2. Specifications
6
7
G3SS GA5-A
Transmission Oil SAE 20,30 motor oil (0.74qt)
Frame
Type ..................................... Tubular, double cradle
Suspension, Front ................. Telescopic fork
Rear ...................................... Swinging arm
Tire Size, Front ..................... 2.75-18 4PR 2.50-18 4PR
Rear ...................................... 2.75-18 4PR 2.75-18 4PR
Brakes
Front, Diameter X Width ....... 4.3X1.2in (110X30mm)
Rear, Diameter X Width ....... 4.3X 1.2in (110X 30mm)
Braking Distance .................. 21ft/22mph (6.5m/35kph)
Electrical Equipment
Battery ................................. 6V 4AH
Head Lamp ........................... 6V, 25/25W
Tail/Brake Lamp ................... 6V, 17/5.3W
Dimensions
Overall Length ..................... 72,0in (1,830mm)
Overall Width ....................... 33.1in ( 840mm)
Overall Height ...................... 40.5in (1,035mm)
Wheelbase ............................ 45.3in (1,150mm)
Ground Clearance ................. 6.5in ( 160mm)
Dry Weight ........................... 178lbs (81kg) 174lbs (79kg)
Fuel Tank Capacity ............... 2.3 US gal (8.6liters)
Oil Tank Capacity ................. 11/4 U.S.qt. (1.2liters)
*Specifications subject to change without notice
Engine GA-1A GA2-A
Type ................................... 2-stroke, rotary valve, single
cylinder, air cooled
Displacement ...................... 5.43cu-in (89cc.)
Bore X Stroke ..................... 1.85X2.04in (47X51.8mm)
Comprcssion Ra.tio 7.0:1
Fuel ..................................... Gasoline
Ignition ............................... Fly-wheel magneto
Ignition Timing ................... 20° Before TDC
Starting ............................... Primary Kick
Lubrication .......................... Superlube (Oil injection)
Engine Oil ........................... 2-stroke engine oil
Carburetor ........................... Mikuni VM19SC
Spark Plug ........................... NGK B-7HZ
Performance
Max, Torque ........................ 7.08ft-lb (0.98kg-m)/7,000rpm
Max. Speed .......................... 62,5mph (100kph) 69mph (110kph)
Climbing Ability .................. 29° 27°
Minimurn Turning Radius .... 70.9in (1,800mm)
Fuel Consumption ............... 171mi/gal@25mph 176mi/gal@25mph
(75km/l@40kph) (75km/l@40kph)
Transmission
Type ................................... 4-speed, constant mesh, 5-speed, constant mesh,
return shift return shift
Clutch ................................. Wet multi-plate
Primary Reduction Ratio ..... 3.52 (74/21)
Final Reduction Ratio .......... 2.79 (39/14) 2.54 (36/14)
8
9
GA-1A GA2-A
Transmission Oil SAE 20-30 motor oil (0.74qt)
Frame
Type .................................... Tubular, double cradle
Suspension, Front ................. Telescopic fork
Rear...................................... Swinging arm
Tire Size, Front .................... 2.50-18 4PR
Rear ..................................... 2.50-18 4PR
Brakes
Front, Diameter X Width ..... 4.3X1.2in (110X30mm)
Rear, Diameter X Width ...... 4.3X1.2in (110X30mm)
Braking Distance .................. 21,3ft/22mph (6.5m/35kph)
Electrical Equipment
Battery ................................ 6V 4AH
Head Lamp .......................... 6V, 25/25W
Tail/Brake Lamp .................. 6V, 5.3/17W
Dimensions
Overall Length ..................... 71.3in (1,810mm)
Overall Width ...................... 29.1in ( 740mm)
Overall Height ..................... 40.2in (1,020mm)
Wheelbase ........................... 45.5in (1,150mm)
Ground Clearance ................. 5.9in ( 150mm)
Dry Weight .......................... 174lbs (79kg)
Fuel Tank Capacity .............. 2.3 US gal (8.6liters)
Oil Tank Capacity ............... 11/4 U.S.qt. (1.2liters)
*Specifications subject to change without notice
Th is figure indic ates brakin g performance t hat can be met or exceeded by the veh icles to which it applies,
without lock i n g t h e w h e e1s, under differen t c o n d i t i o n s of loading. The i n f o r n i a t i o n presented represents
results obta inabl e by skilled driver s und er co ntrolled road and v ehicl e conditions. a.nd the i nformation may
not be correct under other conditions.
Description of vehicles to which this table applies: 90 Model G3SS.
Fully Operational Service Brake
Load:
Light
Maximum
0 50 100 150 200 250
Stopping Distance in Feet from 60 mph.
10
170
174
G3SS
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