HYOSUNG SF 50, Manual

Page 1: ... 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 NOTE This provides special information to make maintenance easier or important instruc tions clearer The personal safety of the rider may be involved Disregarding this information could result i...

Page 2: ...free operating life for your motorcycle Your Hyosung dealer has experi enced technicians that are trained to provide your machine with the best possible service with the right tools and equipment All information illustrations photographs and specifications contained in this manual are based on the latest product information avail able at the time of publication Due to improve ments or other change...

Page 3: ...EANDENGINEOIL 10 HOWTO PROVIDETHEGASOLINE HOWTOSUPPLY THEENGINEOIL 6 THEPROPEROPERATIONS 11 HOWTOSTARTTHEENGINE HOWTOSTARTOFF ADJUSTINGTHESPEEDS HOWTOOPERATETHEBRAKE HOWTOSTOPANDPARK BREAKING IN 7 INSPECTIONBEFORERIDING 16 BRAKES TIRES GASOLINEANDENGINEOIL LAMPS REAR VIEWMIRRORS REFLECTOR 8 PERIODICMAINTENANCE 19 FRONTFORK BRAKES TIRES AIRCLEANER BATTERY TRANSMISSIONOIL ENGINEOILANDGASOLINE 9 MAIN...

Page 4: ...ess responsive to your steering control The weight may also cause oscillations in the front end and lead to instability problems Accessories added to the machine should be as light as possible and kept to a minimum 4 The motorcycle may be affected by a lifting con dition or by an instability in cross winds or when being passed or passing large vehicles Improperly mounted or poorly designed acces s...

Page 5: ... machine and its controls Remember practice makes perfect KNOW YOUR LIMITS Ride within the boundaries of your own skill at all times Knowing these limits and staying within them will help you to avoid accidents BE EXTRA SAFETY CONSCIOUS ON BAD WEATHER DAYS Riding on bad weather days especially wet ones requires extra caution Braking distances double on a rainy day Stay off of the painted surface m...

Page 6: ...switch Horn switch Ignition switch Starter switch Light switch Throttle grip Front brake lever Fuel tank Personal trunk Oil tank Rear carrier Muffler Air cleaner Battery Fuse Seat lock Helmet holder Center stand Kick start lever means the invisable parts ...

Page 7: ...s 1 3ℓ at E the capacity is 4 8ℓ Fill the fuel tank before E IGNITION SWITCH The ignition switch has three positions INSTRUMENT PANEL SWITCH ON POSITION The ignition circuit is completed and the engine can now be started The key cannot be removed from the ignition switch in this position OFF POSITION All electrical circuits are cut off LOCK POSITION To lock the steering turn the handlebar all the ...

Page 8: ...AL SWITCH HORN SWITCH Press the switch to operate the horn LIGHT SWITCH TURN SIGNAL SWITCH HORN SWITCH LIGHT SWITCH Check if the steering is locked When it is not locked Turn the handle right a little CAUTION Turn off the lamp right after completing the turn or lane change If you keep the lamp on it could cause other drivers to be confused CAUTION position The headlamp meter lamp and taillamp come...

Page 9: ...llustration below HOW TO USE THE HELMET HOLDER You can use the Trunk after opening the seat HOW TO OPEN THE SEAT STARTER SWITCH STARTER SWITCH Push in the electric starter switch to rotate the starting motor When the starter motor doesn t rotate within 5 seconds after pushing the switch try again after 10 seconds for preventing the damage on battery CAUTION NOTE If the front or rear brake lever is...

Page 10: ...ld be heated Don t keep anything that doesn t endure heat Don t keep the fragile Check if it is locked The unlocking of trunk could cause serious accident Take care not to spill the oil in the trunk Don t allow water to get inside the trunk or it could damage Don t wash the trunk with water Use the vacuum cleaner Don t keep the valuables in the trunk when leaving unattended CAUTION When refueling ...

Page 11: ...g refueling CAUTION A burnt engine is usually a result of engine starting with no oil in the oil tank Check the oil level before starting to avoid seriously damage WARNING Don t mix the unrecommended oil It could damage the engine When refilling the oil tank Don t allow the dust to get inside Mop the oil spilt Don t put the patch on the cap It could disturb the oil to be provided and damage the en...

Page 12: ...e start motor doesn t rotate within 5 seconds after pushing the start switch try again after 10 seconds for preventing the damage on battery CAUTION When started return the throttle grip CAUTION When started return the kick starter lever CAUTION Don t idle it indoor where there is little or no ventilation available The exhaust gas including carbon monoxide is extremely poisonous WARNING It is not ...

Page 13: ...ter stand Don t grip the seat CAUTION Ride on Gripping the lever with both hands be seated on from leftside of the motorcycle Put the left foot on the earth and fasten the rear brake lever Check the safety Turn on the left turn signal lamp and check the safety Grip up the rear brakd lever Start off Depress the rear brake lever and turn the throttle grip slowly the motorcycle will start moving forw...

Page 14: ...snows When the brake doesn t work normally keep low speeds and apply the brake lightly until smoothly operated HOW TO OPERATE THE BRAKE You can adjust the speeds with the throttle grip Turning Get faster Returning Get slower RETURNING TURNING ADJUSTING THE SPEEDS When turned the throttle grip excessively 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 dangerous WARNING Using either front or ...

Page 15: ...ecessary to allow the moving parts to BREAK IN before subjecting the engine to maximum stresses The future performance and reliability of the engine depends on the care and restraint exercised during its early life The general rules are as follow Keep to these breaking in speed limit Up to 1 000km 600miles Less than 1 2 throttle Upon reaching an odometer reading of 1 000km 600miles you can subject...

Page 16: ...000km or 8 000km is necessary for the full performance and preventing accidents 7 INSPECTION BEFORE RIDING Even though the motorcycle is not run for a long time the periodic maintence is necessary The engine and muffler are too hot right after engine stopped please be caerful not to be burned Don t inspect the engine indoor where there is little or no ventilation available The exhaust gas is extre...

Page 17: ...tch in the ON position FUEL GAUGE FUEL RECOMMENDATION Use unleaded gasoline with an octane rating of 85 95 or higher Research method Unleaded gasoline can extend spark plug life and exhaust components life If pinking or knocking is experienced substitute higher octane grade gasoline or another brand because there are differences between brands ENGINE OIL Replenish the Engine oil when the Engine oi...

Page 18: ... started Check if the lamp are dusty or damaged Check if the mirror shows the rear and or side views Check if the reflector is dusty or damaged HEADLAMP TURNSIGNALLAMP TURNSIGNALLAMP TAILLAMP LAMPS REAR VIEW MIRROR REFLECTOR The lock of engine oil will damage engine severely CAUTION ...

Page 19: ...km Enginebolt nut Tighten Cleanevery3 000km Inspect Inspect Replace Clean Replace every 2years Clean Aircleaner Sparkplug Carburetor Enginehose Every 4 000km Every 8 000km First 1 000km Drivebelt Inspect Inspect Inspect Inspect Inspect Brake Tire Bolt Nut Steering Every 4 000km Every 8 000km CHASSIS Check if there is any noise by bend of front fork while moving the handle upward and downward Inspe...

Page 20: ... How to replenish with brake fluid 1 Clean the brake fluid reservoir around not to allow dusts to get inside of it 2 Loosen the screw and open the cap 3 Replenish with brake fluid to the limit line the recommended brake fluid DOT4 4 Fasten the cap MIDDLE LINE WEARLIMITLINE DISC Check the front rear brake while running in low speeds Check if there is leakage or damage on the brake fluid reservoir a...

Page 21: ...ding TIRES AIR CLEANER Don t replenish with brake fluid over the limit line It will leak out of the brake fluid reservoir Be careful not to allow dusts or water to go inside when it is replenished Don t use the unrecommended brake fluid Brake fluid can damage severely the plastics or rubbers When it is spilt on the parts mop them up CAUTION 1 Take out air cleaner by disassembling 2 screws 2 Put ou...

Page 22: ...ine Be careful not to allow water to go into the filter while washing CAUTION Don t take off the sealed cap Take off the battery when the motorcycle is not used for a long time to prevent electric discharge or leakage When the battery is attached on the motorcycle take off the terminal CAUTION Check if the transmission oil leaks Check if there is leakage around the oil pump and oil tank Check if t...

Page 23: ...n seat 2 Take out the fuse holder 3 Open the fuse holder and take out the fuse When it is beyond the required range replace the brake shoe Fix part of nut to pin or the serious accident can be caused by the brake failure CAUTION Always be sure to replace the blown fuse with the correct amperage fuse If the replaced fuse is blown in a short time it means there are other problems Check the other par...

Page 24: ...semble the cover of battery box 2 Set the ignition switch OFF position 3 Clean the terminal If there is white dust clean it with warm water 4 Assemble the battery wires and grease the terminal lightly Keep the battery away from fires When disassemble the battery wires take off terminal first with the ignition switch OFF position When assemble terminal first CAUTION Don t use the cleaning solvent w...

Page 25: ... 88kg 194lbs ENGINE Type Two stroke forced air cooled Intake system Reed valve Number of cylinder 1 Bore 41 0mm 1 614in Stroke 37 4mm 1 472in Piston displacement 49 3 0cu in Corrected Compression ratio 7 4 1 Carburetor SIDEDRAFT VARIABLE VENTURI PISTON Starter system KICK SELF STARTER TRANSMISSION Clutch Dry shoe automatic centrifugal type Reduction ratio 2 997 0 813 Drive system V belt drive ...

Page 26: ...rake Disc Rear brake Drum ELECTRICAL Ignition type CDI type Ignition timing 20 B T D C at 1 000 rpm Spark plug B8HS Battery 12V 3Ah 10HR Generator Magneto Fuse 10A Headlamp 15W 2 Turn signal lamp 10W 4 Tail Brake lamp 5 10W Speedometer lamp 1 7W 2 Oil level indicator lamp 1 7W Turn signal indicator lamp 1 7W CAPACITIES Fuel tank 4 8ℓ Engine oil tank 1 0ℓ Transmission oil 110cc Replace 130cc Overha...

Page 27: ...ny sale of delivery to the ulti mate purchaser or while it is in use and b The use of the vehicle after such device or element of design has been removed or ren dered inoperative by any person MAINTENANCE The exhaust system of this motorcycle requires no periodic maintenance The engine should be adjusted to the manufacturer s specifications and the spark plug should be kept in good condition Runni...

Page 28: ...Prepared by HYOSUNG MOTORS MACHINERY INC 1st Ed MAY 1999 Printed in KOREA ...