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KTM 50 SX PRO JUNIOR LC - page 1
OWNER’S MANUAL MANUALE D’USO MANUEL D’UTILISA TION MANUAL DE INSTRUCCIONES 2003 BEDIENUNGSANLEITUNG Art.Nr . 3.210.46 4/2002 50 SX PRO JUNIOR LC, 50 SX PRO SENIOR LC ...
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KTM 50 SX PRO JUNIOR LC - page 2
ENGLISH 1 Please insert the serial numbers of the motorcycle below Chassis number Engine number Stamp of dealer IMPOR T ANT PLEASE READ THIS MANUAL THOROUGHL Y BEFORE LETTING YOUR YOUNGSTER RIDE THE MOTORCYCLE FOR THE FIRST TIME. THIS MANUAL CONT AINS IMPOR T ANT INFORMA TION AND RECOMMENDA TIONS THA T WILL HELP YOU AND YOUR YOUNGSTER TO OPERA TE A ...
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KTM 50 SX PRO JUNIOR LC - page 3
ENGLISH 2 Introduction Now you own a modern motorcycle that you and your youngster will certainly enjoy, provided that you service and maintain it properly. This manual contains important information on the operation and maintenance of your new KTM motorcycle. It went to press describing your model’s latest state of development. Nevertheless, the ...
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KTM 50 SX PRO JUNIOR LC - page 4
ENGLISH 3 IMPOR T ANT W ARRANTY AND GUARANTEE INFORMA TIONE KTM mini-sports motorcycles are designed and constructed to r esist the usual wear and tear of normal use in competitions. The motorcycles comply with the regulations and categories curr ently in effect with the leading international motorcycle associations. Observance of the service, main ...
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KTM 50 SX PRO JUNIOR LC - page 5
ENGLISH 4 IMPORT ANT INFORMA TION FOR P ARENTS 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 fr om 6 to 10 years of age with a maximum weight of. 35 kg (78 lbs) and a maximum height of 130 cm (51 in ...
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KTM 50 SX PRO JUNIOR LC - page 6
ENGLISH 5 Page IMPORTANT WARRANTY AND GUARANTEE INFORMATIONE ..3 IMPORTANT INFORMATION ON SAFE DRIVING FOR PARENTS ........................................................................4 SERIAL NUMBER LOCATIONS ...............................................6 Chassis number ..................................................................6 Engin ...
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KTM 50 SX PRO JUNIOR LC - page 7
ENGLISH 6 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. Enter this number in the relevant field on page 1. Engine typ 50 MCH Throttle grip The throttle grip is ...
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KTM 50 SX PRO JUNIOR LC - page 8
ENGLISH 7 Filler cap To open it: turn filler cap counter-clockwise. To close it: put filler cap back on and tighten it by turning it clockwise. Install tank breather hose 1 without kinks. Fuel tap The fuel tap 2 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. Closi ...
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KTM 50 SX PRO JUNIOR LC - page 9
ENGLISH 8 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. Plugin - Stand (50 SX PRO SENIOR) A socket is provided on th ...
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KTM 50 SX PRO JUNIOR LC - page 10
ENGLISH 9 ...
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KTM 50 SX PRO JUNIOR LC - page 11
ENGLISH 10 GENERAL TIPS AND W ARNINGS FOR ST ARTING THE MOTORCYCLE WARNING –H AVE YOUR YOUNGSTER WEAR PROPER PROTECTIVE GEAR WHENEVER HE OR SHE RIDES THE MOTORCYCLE : HELMET , EYE PROTECTION , CHEST , BACK , ARM AND LEG PROTECTORS , GLOVES AND BOOTS . T O SET A GOOD EXAMPLE , BE SURE TO WEAR PROTECTIVE GEAR YOURSELF WHENEVER RIDING A MOTO ...
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KTM 50 SX PRO JUNIOR LC - page 12
ENGLISH 11 DRIVING INSTRUCTIONS What you should check before each start When you start off, the motorcycle must be in a perfect technical condition. For safety reasons, you should make it a habit to perform an overall check of your motorcycle before each start. The following checks should be performed: 1 CHECK TRANSMISSION OIL LEVEL A lack of gear ...
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KTM 50 SX PRO JUNIOR LC - page 13
ENGLISH 12 Starting when the engine is cold 1 Open fuel tap 1 . 2 Operate the choke 2 . 3 Kick the side up all the way or remove the plug-in stand. 4 Apply the front brake. 5 Operate the kickstarter, depressing it all the way, without opening the throttle. WARNING – W HEN STARTING THE ENGINE , PUT ON MOTORCYCLE BOOTS IN ORDER TO AVOID INJ ...
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KTM 50 SX PRO JUNIOR LC - page 14
ENGLISH 13 ! CAUTION ! –D RIVING A COLD ENGINE AT HIGH SPEED WILL REDUCE THE LIFE OF THE ENGINE . W ER ECOMMEND 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 . T HE SIDE STAND COULD FOLD AWAY AND THE MOTORCYCLE RUN OUT OF C ...
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KTM 50 SX PRO JUNIOR LC - page 15
ENGLISH 14 PERIODIC MAINTENANCE SCHEDULE 2003 Service every 5 hours Service every 20 hours M AINTENANCE WORK DONE BY KTM AUTHORISED WORKSHOPS IS NOT A SUBSTITUTE FOR CARE AND CHECKS DONE BY THE RIDER ! A clean motorcycle can be checked more quickly which saves money! Check engine for leaks ● Change transmission oil ● Check spark plug, change it ...
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KTM 50 SX PRO JUNIOR LC - page 16
ENGLISH 15 V IT AL 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 ...
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KTM 50 SX PRO JUNIOR LC - page 17
ENGLISH 16 Removing the seat The quick-release mechanism 1 allows removal of the seat without tools. Turn the quick-release device approximately 180° counterclockwise, lift the rear portion of the seat and pull the seat off backwards. When mounting the seat ensure that the hook engages at the tank. Checking and adjusting the steering head bearing ...
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KTM 50 SX PRO JUNIOR LC - page 18
ENGLISH 17 1 2 3 Checking and adjusting the steering head bearing (50 SX SENIOR) * 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 adjust, loosen both clamping screws 1 on the u ...
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KTM 50 SX PRO JUNIOR LC - page 19
ENGLISH 18 A B C D 1 Basic suspension setup for the weight of the driver To achieve maximum handling performance and to prevent the telescopic fork and shock absorber from being damaged, the basic setup of the suspension components must be suitable for your child's weight. At delivery, KTM's mini motorcycles are set to accommodate a drive ...
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KTM 50 SX PRO JUNIOR LC - page 20
ENGLISH 19 T elescopic 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 1 from the brake caliper and unscrew holding clamp. Measure the projection of the fork le ...
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KTM 50 SX PRO JUNIOR LC - page 21
ENGLISH 20 Cleaning the dust scrabbers of the telescopic fork The dust-protection bellows 1 are to remove dust and coarse dirt particles from the fork tube. However, after some time, dirt may also get in behind the dust-protection bellows. If this dirt is not removed, the oil sealing rings located behind it may start to leak. For this purpose, use ...
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KTM 50 SX PRO JUNIOR LC - page 22
ENGLISH 21 General information about KTM disc brakes BRAKE FLUID RESERVOIRS: The brake fluid reservoirs for the front brake is designed such that it does not need to be refilled, even if the brake shoes are worn. If the brake fluid level drops below the minimum level either the brake system has a leak or the brake pads are completely worn. In this ...
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KTM 50 SX PRO JUNIOR LC - page 23
ENGLISH 22 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. WARNING A T THEIR MOST WORN POINT BRAKE PAD LININGS SHOULD NOT BE THINNER THAN 1 MM (0.04 IN ), OTHERWISE THEY COULD LEAD TO BRAKE FAILURE . F OR YOUR OWN SAFETY DON ’ T PUT OFF HAVING YOUR BRAKE PAD ...
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KTM 50 SX PRO JUNIOR LC - page 24
ENGLISH 23 Drum brake maintenance Drum brake maintenance is limited to occasional blowing out of the brake drum and brake shoes. 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 hexag ...
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KTM 50 SX PRO JUNIOR LC - page 25
ENGLISH 24 Ti res, air pressure Tire type, tire condition, and air pressure level affect the way your motor- cycle rides, and they must therefore be checked whenever you are getting ready to go anywhere on your motorcycle. – Tire size can be found in the technical specifications. – Tire condition has to be checked every time you want to ride yo ...
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KTM 50 SX PRO JUNIOR LC - page 26
ENGLISH 25 when engine is cold 10 mm Checking coolant level The coolant should be 10 mm (0.4 in) above the radiator fins when the engine is cold (see illustr.). In the event of the coolant being drained, always fill and bleed the system. WARNING I FP OSSIBLE , ALWAYS CHECK LEVEL OF COOLING LIQUID WHEN ENGINE IS COLD . I F YOU HAVE TO OPEN T ...
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KTM 50 SX PRO JUNIOR LC - page 27
ENGLISH 26 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. The fork tubes extend approx. 17 mm (0.7 in) (H) above the upper fork stabilizer. The shock absorber is attached to the upper ho ...
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KTM 50 SX PRO JUNIOR LC - page 28
ENGLISH 27 Checking the gear oil level To check the gear oil level, first remove the plug 1 . With the motorcycle parked in an upright position, a small quantity of oil should flow out of the indicator opening 2 . If oil must be added, tilt the motorcycle and pour automatic gear oil ( Shell Donax TA) into the bore. ! CAUTION ! L ESS OIL OR A POOR O ...
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KTM 50 SX PRO JUNIOR LC - page 29
ENGLISH 28 If you let the specified maintenance work on your motorcycle be carried out, disturbances can hardly be expected. Should an error occur nevertheless, we advise you to use the trouble shooting chart in order to find the cause of error. We would like to point out that many operations cannot be performed by oneself. In case of uncertainty, ...
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KTM 50 SX PRO JUNIOR LC - page 30
ENGLISH 29 TROUBLE Engine stalling or running with four stroke cycle High rpm misfiring Engine spluters into the carburetor Engine overheating Emission of white smoke (steam) Excessive oil escapes from transmission breather tube CAUSE Carburetor overflows if level adjust too high, float needle seating is dirty or enlarged Loose carburetor jets Inco ...
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KTM 50 SX PRO JUNIOR LC - page 31
ENGLISH 30 Clean your motorcycle regularly in order to keep its painted finish looking shiny and new. The best manner would be to use warm water that has been mixed with a commercially available washing detergent and a sponge. The hard dirt can be removed before with the help of a soft water jet. ! CAUTION ! N EVER CLEAN YOUR MOTORCYCLE WITH A HIGH ...
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KTM 50 SX PRO JUNIOR LC - page 32
ENGLISH 31 TECHNICAL DA T A – ENGINE 50 LC 2003 Engine 50 SX PRO JUNIOR LC 50 SX PRO SENIOR LC Design single cylinder 2-stroke engine, with reed valve inlet Displacement 49.0 ccm Bore/Stroke 39.5 / 40 mm Fuel SUPER fuel, research octane no 95, mixed with 2-stroke oil Oil/gasoline ratio 1 : 40 when using high grade 2-stroke oil (Shell Advance Raci ...
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KTM 50 SX PRO JUNIOR LC - page 33
ENGLISH 32 Hexagon nuts front/rear axle M12x1 30 Nm Hexagon nut swing arm bolt M12 40 Nm Clamping screw upper/lower fork bridge M8 15 Nm Screws handlebar clamp M8 20 Nm Shock absorber top/bottom M10 45 Nm Allan screw – Handlebar support M10 Loctite + 40 Nm Front brake caliper M8 Loctite + 20 Nm Front brake disk M6 Loctite + 10 Nm Spoke nipple M4 ...
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KTM 50 SX PRO JUNIOR LC - page 34
ENGLISH 33 HEAD WORD INDEX Page Adjusting the control cable on the rear wheel ....................22 Adjusting the idle speed (Dell’Orto PHBG 19 BS) ...............26 Adjusting the idle speed (Dell’Orto PHVA 14 DS) ..............26 Adjusting the throttle cable ................................................26 Basic suspension setup for the wei ...
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KTM 50 SX PRO JUNIOR LC - page 35
KTM SPORTMOTORCYCLE AG 5230 Mattighofen Austria Internet: www .ktm.at 321046 ...
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