KTM 50 SX PRO JUNIOR LC Owner's Manual
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KTM 50 SX PRO JUNIOR LC Owner's Manual

Ktm motorcycle owner's manual
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Summary of Contents for KTM 50 SX PRO JUNIOR LC

  • Page 2: Engine Number

    IMPORTANT PLEASE READ THIS MANUAL THOROUGHLY BEFORE YOUNGSTER RIDE THE MOTORCYCLE FOR THE FIRST TIME. THIS MANUAL CONTAINS IMPORTANT INFORMATION AND RECOMMENDATIONS THAT WILL HELP YOU AND YOUR YOUNGSTER TO OPERATE AND HANDLE THE MOTORCYCLE PROPERLY. IN THE INTEREST OF EVERYBODY INVOLVED, WE URGE YOU TO PAY PARTI-...
  • Page 3 Compliance with these instructions will significantly prolong the life of your motorcycle. Be sure to have the maintenance work carried out by a KTM workshop to avoid losing your right to claim under the warranty. For the safety of your child, only use spare parts and accessories approved by KTM. KTM shall not assume any liability for other products or consequential damage resulting from the use of such products.

  • Page 4: Important Warranty And Guarantee Informatione

    The service work specified in the "Lubrication and Maintenance Schedule" must be performed by a KTM workshop and recorded in the service manual otherwise claims under the warranty shall become void. The fuels and lubricants specified in the Owner's Manual or automotive fluids with equivalent specifications must be used in accordance with the maintenance schedule.

  • Page 5: Important Information On Safe Driving For Parents

    IMPORTANT INFORMATION FOR PARENTS ABOUT SAFE DRIVING KTM mini motorcycles are off-road motorcycles designed for one person only. They are not allowed on public roads. The vehicle dimensions and components are designed for children from 6 to 10 years of age with a maximum weight of.

  • Page 6: Table Of Contents

    Checking the chain tension ...20 Correct chain tension ...20 Chain maintenance ...20 Generel information about KTM disc brakes ...21 Setting the basic position and play of the hand brake lever ..21 Checking/refilling the front brake fluid level ...21 Checking the front brake pads ...22 Replacing the front brake pads ...22...

  • Page 7: Serial Number Locations

    SERIAL NUMBER LOCATIONS Chassis number The chassis number is located on the type plate on the steering head. Enter this number in the field on page no 1. Engine number The engine number is stamped into the right half of the engine case next to the kickstarter.

  • Page 8: Filler Cap

    Fuel tap The fuel tap is located at the front of the motorcycle on the left side of the tank. Opening the fuel tap: Turn the knob all the way to the left. Closing the fuel tap: Turn the knob all the way to the right.

  • Page 9: Foot Brake Lever

    Foot brake lever The foot brake lever is located in front of the right footrest. The basic position can be adjusted to the seating position (see maintenance work). Side stand Use your foot to swing the side stand forwards to the stop. Make sure it rests securely on solid ground.

  • Page 11: Motorcycle

    GENERAL TIPS AND WARNINGS FOR STARTING THE MOTORCYCLE Instructions for the first ride – Verify that your KTM dealer performed the PREPARATION OF VEHICLE jobs (see Customer Service Manual). – Before your youngster takes his or her first ride, explain how each of the controls works and check if your youngster has understood what you explained.

  • Page 12: Driving Instructions

    If the brake fluid falls below the minimum level, the brake system is either leaking or the brake shoes are completely worn out. Have the brake system checked at a KTM workshop to avoid brake failure. Also have the condition of the brake hose and the brake lining thickness checked.

  • Page 13: Starting When Engine Is Cold

    FUMES ARE POISONOUS AND CAN CAUSE LOSS OF CONSCIOUSNESS AND DEATH LWAYS PROVIDE ADEQUATE VENTILATION WHILE THE ENGINE IS RUNNING ’ T RIDE YOUR MOTORCYCLE WITH FULL LOAD AND HIGH REVS WHEN ENGINE IS COLD ECAUSE THE PISTON IS WARMING UP FASTER THAN THE WATER COOLED...

  • Page 14: Braking

    E RECOMMEND TO WARM THE ENGINE UP AT A MEDIUM ENGINE SPEED FOR SEVERAL MINUTES BEFORE SWITCHING TO FULL LOAD – N EVER TILT THE MOTORCYCLE OVER THE SIDE STAND TO WARM UP THE ENGINE HE SIDE STAND COULD FOLD AWAY AND THE MOTORCYCLE RUN OUT OF CONTROL –...

  • Page 15: Periodic Maintenance Schedule

    PERIODIC MAINTENANCE SCHEDULE 2003 A clean motorcycle can be checked more quickly which saves money! Check engine for leaks Change transmission oil Check spark plug, change it if necessary, set electrode gap Check carburetor for a tight fit at intake flange...
  • Page 16 ITAL CHECKS AND CARE PROCEDURES TO BE CONDUCTED BY THE OWNER OR THE MECHANIC Check transmission oil level Check cooling liquid level Check brake fluid level Check brake pads for wear Check brake performance Lubricate and adjust actuating cables and nipples Remove and clean dust sleeves of telescopic fork at regular intervals Clean and lubricate chain, check tension and readjust it if necessary Clean air filter and filter box...

  • Page 17: Maintenance Work On Chassis And Engine

    MAINTENANCE WORK AND ADJUSTMENTS MARKED WITH AN ASTERISK (*) MUST BE PER- FORMED BY AN EXPERT. TO PROTECT YOUR YOUNGSTER, ALWAYS HAVE SUCH WORK PER- FORMED BY A SPECIALIZED KTM DEALER WHERE YOUR MOTORCYCLE WILL BE OPTIMALLY SERVICED BY APPROPRIATELY QUALIFIED, SKILLED STAFF.

  • Page 18: Changing Handlebar Position

    The steering head bearing should be checked regularly for play. To check, support the motorcycle frame and lift the front wheel off the ground. Now try to move the fork back and forth – you should not feel any play. To...

  • Page 19: Basic Suspension Setup For The Weight Of The Driver

    Sag ..........45 mm 50 SX Pro Junior LC shock absorber sag ... . . 45 mm (± 5 mm) 50 SX Pro Senior LC shock absorber sag .

  • Page 20: Telescopic Fork Maintenance

    Telescopic fork maintenance * The telescopic fork must be serviced at least once a year. To service the fork, proceed as follows: Prop up the motorcycle under the frame to take the load off the front wheel. Disassemble the front wheel, remove screw unscrew holding clamp.

  • Page 21: Cleaning The Dust Scrabbers Of The Telescopic Fork

    (Shell Advance Bio Chain). EEP THE REAR WHEEL FREE OF GREASE REDUCE THE GRIP OF THE REAR TIRE AND THE MOTORCYCLE COULD EASILY GET OUT OF CONTROL HEN MOUNTING THE CHAIN MASTERLINK CLIP CLIP MUST POINT IN RUNNING DIRECTION Also check sprockets and chain guides for wear, and replace if necessary.

  • Page 22: Generel Information About Ktm Disc Brakes

    In this case, consult an authorized KTM dealer immediately. BRAKE FLUID: KTM fills the brake system with ”Shell Advance Brake DOT 5.1”, one of the best brake fluids currently available. We recommend that you continue to use it. DOT 5.1 brake fluid is based on glycol ether and of an amber color.

  • Page 23: Checking The Front Brake Pads

    min. 1 mm 5-10 mm min 50 mm Checking front brake pads Inspect the brake pads from in front of the vehicle. The linings must be at least 1 mm (0.04 in) thick. T THEIR MOST WORN POINT BRAKE PAD LININGS SHOULD NOT BE THINNER THAN (0.04 OTHERWISE THEY COULD LEAD TO BRAKE FAILURE ’...

  • Page 24: Drum Brake Maintenance

    Brake drum and brake linings can be slightly roughened with an abrasive tape. Removing and mounting the front wheel Jack the motorcycle up by the frame so that the front wheel is suspended above the ground. Undo the hexagon nut and remove it together with the washer.

  • Page 25: Tires, Air Pressure

    Check spoke tension, especially on a new motorcycle, at regular intervals. If neces- sary, have the spokes retightened and the wheel centered by a KTM dealer. – S POKES CAN TEAR IF YOU CONTINUE TO RIDE WITH THEM LOOSE UNSTABLE HANDLING OF YOUR MOTORCYCLE –...

  • Page 26: Checking Coolant Level

    . Before tightening the screws, turn the outer tube until they match the positions you marked. Mount the silencer and check the exhaust system for tightness. NOTE: Glass fiber yarn packages are offered by your licensed KTM dealer. WARNING HE EXHAUST SYSTEM BECOMES VERY HOT WHILE THE MOTORCYCLE IS RUNNING...

  • Page 27: Changing The Seat Height

    Changing the seat height The saddle can easily be raised by 25 mm (1 in). This lets you adjust the height as your child grows. Figures A and B show the fork and shock absorber positions for a low seat position.

  • Page 28: Checking The Gear Oil Level

    To check the gear oil level, first remove the plug parked in an upright position, a small quantity of oil should flow out of the indicator opening . If oil must be added, tilt the motorcycle and pour automatic gear oil ( Shell Donax TA) into the bore. CAUTION...

  • Page 29: Trouble Shooting

    We would like to point out that many operations cannot be performed by oneself. In case of uncertainty, please contact a KTM-dealer.
  • Page 30 TROUBLE Engine stalling or running Carburetor overflows if level adjust with four stroke cycle too high, float needle seating is dirty or enlarged Loose carburetor jets High rpm misfiring Incorrect heat range spark plug or low quality spark plug Loose, corroded or non conductive ignition socket connector Engine spluters into the Lack of fuel...

  • Page 31: Cleaning / Storage

    – Before cleaning with water, plug the exhaust pipe to prevent water ingress. – After the motorcycle has been rinsed with a soft water jet, it should be dried by air pressure and a cloth. Then take a short drive until the engine has reached its operating temperature, and also operate the brakes.

  • Page 32: Specifications

    Transmission oil Spark plug Electrode gap Carburetor Air filter Cooling liquid BASIC CARBURETOR SETTING Model 50 SX PRO JUNIOR LC Type Dell’Orto PHVA 14 DS Main jet Needle jet Idling jet Jet needle Needle position from top Air/Mixture reg. screw open...

  • Page 33: Technical Specifications - Chassis

    STANDARD-ADJUSTMENT – FORK Spring Preload Fork oil Air chamber length 50 SX PRO JUNIOR LC single downtube, split-cradle Marzocchi Ø = 32 mm (1.26 in) 135/200 mm (5.3/8 in) Central shock absorber WP Disk brake Ø 160 mm (6.4 in) Drum brake Ø...

  • Page 34: Important Information On Safe Driving For Parents

    Fuel tap ...7 HEAD WORD INDEX Page General tips and warnings for starting the motorcycle...10 Generel information about KTM disc brakes...21 Hand brake lever ...6 How to change the handlebar position...17 Important information on safe driving for parents ...4 Instructions for the first ride...10 Kickstarter...7...
  • Page 35 321046...

This manual is also suitable for:

50 sx pro junior lc 200350 sx pro senior lc 2003

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