HYOSUNG GF125 User manual

FOREWORD
               












 
HYOSUNG MOTORS & MACHINERY INC.

GROUP INDEX
GENERAL INFORMATION 1
PERIODIC MAINTENANCE AND
TUNE-UP PROCEDURES 2
SERVICING ENGINE 3
FUEL AND LUBRICATION SYSTEM 4
ELECTRICAL SYSTEM 5
CHASSIS 6
SERVICING INFORMATION 7

GENERAL INFORMATION
SERIAL NUMBER LOCATIONS 1-1
FUEL AND OIL RECOMMENDATIONS 1-1
BREAK-IN PROCEDURE 1-1
SPECIAL FEATURES 1-2
SPECIAL MATERIALS 1-6
PRECAUTIONS AND GENERAL INSTRUCTIONS 1-8
SPECIFICATIONS 1-9
CONTENTS 1

1-1 GENERAL INFORMATION
SERIAL NUMBER LOCATIONS
 
 



BREAK-IN PROCEDURE
       


      
       


ENGINE OIL
         
          
         

FRONT-FORK OIL
FUEL AND OIL
RECOMMENDATIONS
FUEL
        

NOTE:
Unleaded and low-lead gasoline will extend spark
plug life.







 
        


 



























GENERAL INFORMATION 1-2
SPECIAL FEATURES
GF 125           

1. IMPROVEMENT OF ENGINE POWER AT MIDDLE AND LOW SPEEDS
   
                

2. LESS VIBRATION AND NOISE
                 
      



3. COMFORTABLE SEATING


THE TECHINICAL FEATURES
1. CYLINDER HEAD




2. PISTON, CONNECTING ROD and CAM CHAIN






1-3 GENERAL INFORMATION
3. CLUTCH MISSION


4. VALVE TRAIN






5. CAM SHAFT, LOCK ARM and VALVE


    
        

      

        



       
   







GENERAL INFORMATION 1-4
IGNITION SYSTEM
DESCRIPTION



ADVANTAGES OF CAPACITOR DISCHARGE IGNITION SYSTEM
�
�
�
�
OPERATION



                     
  




 



 




P1P2
D1C1
SCR
lg1lg2










1-5 GENERAL INFORMATION
P2
P2
N2N1
P2
P2P1
P1
P1
(B.T.D.C.)
P1
Θ1
Θ2
Θ2
Θ2
③
②
①
360�











GENERAL INFORMATION 1-6
SPECIAL MATERIALS
                     


Material page page partpart
● Oil seals
● Wheel bearing
● Speedometer gear box
● Steering stem steel balls
● Brake cam
● Mounting drum
● Dust seal cover and spacer
3-45
6- 4
6-34
6- 5
6-18
6-35
6-36
6-39
6-22
6-26
● Brake caliper holder
3-22
3-23
3-25
● Piston pin
● Valve stem
● Rocker arm shaft
3-45
6-10
● Mating surfaces of left
and right crankcase
● Front fork damper rod bolt
GREASE “G2”
99000-07000
SILICONE
GREASE
99000-25100
MOLY PASTE
99000-25140
THREE
BOND No. 1215
99000-31110
Sh Sh
Al
v
n
i
a
a
ell
3
Indu Indu
Multi-
Multi-
pur
pur
strial
strial
pose pose
G reaseGrease
1215
LiquidGasketGray.
SolventlessSilicone&Sagtype.
Excellentheat&gasolineresistance.
LiquidG asket
White.
ThreeBondCo,.Ltd.
Madeinjapan
MOLYPASTE
LiquidGasketWhite.
SolventlessSilicone&Sagtype.
Excellentheatresistance.
M OLY P ASTE