HYOSUNG SF 50 Manual
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IMPORTANT
BREAK-IN INFORMATION FOR
YOUR MOTORCYCLE
The first 1,000km(600miles) are the most impor-
tant in the life of your motorcycle .
Proper break-in operation during this time will
help ensure maximum life and performance from
your new motorcycle.
Hyosung parts are manufactured of high quality
materials, and manufactured parts are finished to
close tolerances. Proper break-in operation
allows the machined surfaces to polish each
other and mate smoothly.
Motorcycle reliability and performance depend
on special care and restraint exercised during
the break-in period. It is especially important that
you avoid operating the engine in a manner
which could expose the engine parts to exces-
sive heat.
Please refer to the BREAK-IN section for specific
break-in recommendations.
WARNING/CAUTION/NOTE
Please read this manual and follow its instruc-
tions carefully. To emphasize special informa-
tion the words WARNING, CAUTION and NOTE
carry special meanings and should be carefully
reviewed.
WARNING
The personal safety of the rider may be
involved. Disregarding this information
could result in injury to the rider.
CAUTION
These instructions point out special
s e r v i c e p r o c e d u r e s o r p r e c a u t i o n s
that must be followed to avoid damag-
i n g t h e m a c h i n e .
NOTE: This provides special information to
make maintenance easier or important instruc-
tions clearer.
1

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Summary of Contents for HYOSUNG SF 50

  • Page 1 The personal safety of the rider may be Hyosung parts are manufactured of high quality involved. Disregarding this information materials, and manufactured parts are finished to could result in injury to the rider.
  • Page 2 FOREWORD THANK YOU for choosing Hyosung. We at All information, illustrations photographs and Hyosung have designed, tested and produced specifications contained in this manual are this motorcycle using the most modern tech- based on the latest product information avail- nology available to provide you with many able at the time of publication.
  • Page 3: Table Of Contents

    TABLE OF CONTENTS 7. INSPECTION BEFORE RIDING 1. CONSUMER INFORMATION BRAKES ACCESSORY INSTALLATION AND PRECAUTION TIPS TIRES GASOLINE AND ENGINE OIL SAFE RIDING RECOMMENDATION FOR MOTORCYCLE RIDERS LAMPS SERIAL NUMBER LOCATION REAR-VIEW MIRRORS REFLECTOR 2. NAMES OF EACH PART 8. PERIODIC MAINTENANCE FRONT FORK 3.
  • Page 4: Consumer Information

    It is not possible for (5) Certain accessories displace the rider from his or Hyosung to test each accessory on the market or her normal riding position. This limits the free- combinations of all the available accessories, how-...
  • Page 5: Serial Number Location

    WEAR A HELMET SERIAL NUMBER LOCATION Motorcycle safety equipment starts with a quality safety helmet. One of the most serious injuries The frame and/or engine serial numbers are that can happen is a head injury. ALWAYS wear used to register the motorcycle. They are a properly approved helmet.
  • Page 6: Names Of Each Part

    2. NAMES OF EACH PARTS ① Rear brake lever ② Turn signal switch ③ Horn switch ④ Ignition switch ⑤ Starter switch ⑥ Light switch ⑦ Throttle grip ⑧ Front brake lever ⑨ Fuel tank ⑩ Personal trunk ⑪ Oil tank ⑫...
  • Page 7: Controls

    remaining amount of oil has become approximately 3. CONTROLS 0.23ℓ. INSTRUMENT PANEL CAUTION The lack of Engine oil could cause serious damages on the Engine. SWITCH ① IGNITION SWITCH The ignition switch has three positions: ① SPEEDOMETER The speedometer indicates the road speed in kilometers per hour.
  • Page 8: Switch

    For preventing steal, Lock the steering. ⓐ Turn right the handle. ⓑ Turn the key from ( OFF ) to ( Lock ) . HORN SWITCH ( Lock ) to ( OFF ) . ⓒ Pull out the key while from CAUTION ●...
  • Page 9: How To Use

    ⑤ STARTER SWITCH 4. HOW TO USE HOW TO USE THE HELMET HOLDER STARTER SWITCH When keep a helmet temporally, use the helmet holder following the illustration below. HELMET HOLDER Push in the electric starter switch to rotate the starting motor.
  • Page 10: How To Use The Personal Trunk

    5. GASOLINE AND ENGINE OIL HOW TO USE THE PERSONAL TRUNK Keep the maintenance manual in the personal trunk. HOW TO PROVIDE THE GASOLINE Put the helmet as shown in the picture. 1. Insert the ignition key into the lock located a center CAUTION of the footboard and turn it counterclockwise.
  • Page 11: How To Supply The Engine Oil

    6. THE PROPER OPERATIONS CAUTION Take care not to spill gasoline during refueling. HOW TO START THE ENGINE HOW TO SUPPLY THE ENGINE OIL � Open the seat. Before riding � Turn the oil tank cap left. ● Check how much the engine oil and �...
  • Page 12 � Push the start switch without turning the ● It is not started easily in the cases as follows. 1 ) It has been long since you started the motorcycle. throttle grip. 2 ) There was no gasoline left. In this case ( 1.2 ) , push the start button longer without turning the throttle grip.
  • Page 13: How To Start Off

    CAUTION HOW TO START OFF Don’ t let the engine run excessively before riding. � Return the center stand. For returning the center stand, push the motorcycle � Check the safety forward gripping the rear brake lever with left hand and the rear carrier with right hand.
  • Page 14: Adjusting The Speeds

    ● Grip the brake lever right after returning the WARNING throttle grip. When turned the throttle grip excessively, ● Make the speed lower by operating the brake i t w i l l m a k e q u i c k s t a r t w h i c h i s slowly.
  • Page 15: How To Stop And Park

    � Lock the steering for security. HOW TO STOP AND PARK � Pull the ignition key out of the lock and keep it yourself. � Turn on the turn signal lamp and return the throttle grip. BREAKING-IN � When completely stopped, turn off the ( OFF ) turn signal lamp.
  • Page 16: Inspection Before Riding

    � BRAKE FLUID 7. INSPECTION BEFORE RIDING ● Keep the motorcycle upright and place the handlebar straight. Running inspection once in a day and periodic ● Check brake fluid level by observing the middle maintenance ( 4,000km or 8,000km ) is necessary line on the brake fluid reservoir.
  • Page 17: Gasoline And Engine Oil

    CAUTION GASOLINE AND ENGINE OIL If there are some problem with the tire � THE GASOLINE pressure or cracks and cuts, it will decrease the riding stability and lead to ● Check if the remaining gasoline is enough for flat tire. running to the destination.
  • Page 18: Rear-View Mirrors

    CAUTION REAR - VIEW MIRROR The lock of engine oil will damage engine Check if the mirror shows the rear and/or side severely. views. LAMPS ● Check if the head lamp, tail lamp and turn signal lamp work well with the engine started. ●...
  • Page 19: Periodic Maintenance

    � CHASSIS 8. PERIODIC MAINTENANCE First Every Every 1,000km 4,000km 8,000km The belows show the schedule of periodic Drive belt - - Inspect maintenance by mileages. More frequent maintenance must be performed on motorcycles Inspect Brake ← - that are used under severe conditions. Inspect Tire -...
  • Page 20 MIDDLE LINE ● Check the front/rear brake while running in low speeds. BRAKE PADS ● Check if there is leakage or damage on the ● Wearing condition of brake pads can be brake fluid reservoir and the connected parts are loose.
  • Page 21: Tires

    UPPER LIMIT LINE CAUTION AIR CLEANER ● Don’ t replenish with brake fluid over the limit line. It will leak out of the brake fluid 1. Take out air cleaner by disassembling 2 screws. reservoir. 2. Put out the filter. ●...
  • Page 22: Air Cleaner

    CAUTION ENGINE OIL AND GASOLINE ● When the assembly of air cleaner filter is ● Check if there is leakage around the oil pump not completely done, dusts can go inside and oil tank. and damage severely engine. ● Be careful not to allow water to go into the filter while washing.
  • Page 23: Maintenance Tips

    9. MAINTENANCE TIPS FUSES ( OFF ) Check the fuse with the ignition switch BRAKE LEVER 1. Remove the battery cover under the pillion seat. 2. Take out the fuse holder. 3. Open the fuse holder and take out the fuse. Check if it is within the required range when you squeeze the brake lever until feel the resistance.
  • Page 24: Battery Terminal

    BATTERY TERMINAL NON-FLAMMABLE CLEANING SOLVENT Clean the battery terminal when it is dusty or rusted. 1. Deassemble the cover of battery box. ( OFF ) position. 2. Set the ignition switch 3. Clean the terminal. If there is white dust, clean it with warm water.
  • Page 25: Specifications

    10. SPECIFICATIONS DIMENSIONS AND DRY MASS Overall length 1,825mm(71.9in) Overall width 635mm(25.0in) Overall height 1,110mm(43.7in) Wheelbase 1,270mm(50.0in) Ground clearance 125mm(4.9in) Dry mass 88kg(194lbs) ENGINE Type Two-stroke, forced air cooled Intake system Reed valve Number of cylinder Bore 41.0mm(1.614in) Stroke 37.4mm(1.472in) Piston displacement 49㎤(3.0cu.in) Corrected Compression ratio...
  • Page 26 CHASSIS Front suspension Telescopic type Rear suspension Coil spring type 25 。 Caster Trail 75mm(2.95in) 45 。 (right & left) Steering angle Front tire size 110/70-12 47J Rear tire size 120/70-12 51J Front brake Disc Rear brake Drum ELECTRICAL “ CDI ” type Ignition type 20 。...
  • Page 27 WARNING Noise Control System (muffler assembly) TAMPERING WITH NOISE CONTROL SYSTEM PROHIBITED Owners are warned that the law may prohibit : (a) The removal or rendering inoperative by any person other than for purpose of mainte- nance, repair or replacement, of any device or element of design incorporated into any new vehicle for the purpose of noise control prior to its any sale of delivery to the ulti- mate purchaser or while it is in use ;...
  • Page 28 Prepared by HYOSUNG MOTORS & MACHINERY INC. 1st Ed. MAY. 1999 Printed in KOREA...

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