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4/2007 FOTO: MITTERBAUER
OWNER’S MANUAL 2008
50 SX JUNIOR
*3211222en*
3211222en 50 SX
3211222en
KTM Group Partner
KTM-Sportmotorcycle AG
A–5230 Mattighofen
www.ktm.com
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INTRODUCTION » Now you own a modern motorcycle that you and your youngster will certainly enjoy, provided that you serv- ice and maintain it properly. Please insert the serial numbers of the motorcycle below Chassis number Engine number 1 Stamp of dealer All information contained is without obligation. KTM-Sportmotorcycle AG particularly reserves the right to modify any equipment, technical specifications, prices, colors, shapes, materials, services, service work, constructions, equipment and th
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ENGLISH IMPORTANT INFORMATION » INTENDED PURPOSE KTM mini-sports motorcycles are designed and constructed to resist the usual wear and tear of normal use in competitions. The motorcycles comply with the regulations and categories currently in effect with the leading interna- tional motorcycle associations. OWNER’S MANUAL Please read this manual thoroughly before letting your youngster ride the motorcycle for the first time. This manual contains important information and recommendations that will
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IMPORTANT INFORMATION » WARRANTY 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. No claims can be filed under the warranty for damage or consequential damage caused by manipulations or conversions to the motorcycle. AUTOMOTIVE FLUIDS The fuels and lubricants specified in the Owner's Manual or automotive fluids with equivalent specifica- tions must
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ENGLISH 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 4 to 10 years of age with a maximum weight of. 35 kg (78 lbs) and a maximum height of 130 cm (51 in). 4 – Have your youngster wear proper protective gear whenever he or she rides the motorcycle: helmet, eye protection, chest, back, arm and leg protecto
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TABLE OF CONTENTS » Page Page IMPORTANT INFORMATION FOR PARENTS Changing spring preloading of the shock absorber . . .20 ABOUT SAFE DRIVING . . . . . . . . . . . . . . . . . . . . . . . . .4 Check chain tension . . . . . . . . . . . . . . . . . . . . . . . .20 Correct chain tension . . . . . . . . . . . . . . . . . . . . . . .20 SERIAL NUMBER LOCATIONS . . . . . . . . . . . . . . . . . . . .6 Chain maintenance . . . . . . . . . . . . . . . . . . . . . . . . .20 Chassis number . . . . . . .
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ENGLISH 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. Enter this number in the relevant field on page 1. 6
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OPERATION INSTRUMENTS » Throttle grip The throttle grip is located on the right side of the handlebars. It is used to reduce the engine speed and, thus, the driving speed. Hand brake lever The hand brake lever is located on the right side of the handlebars and actuates the front wheel brake. The basic position can be adjusted to fit your child's hand. 7 Short circuit button 1 The short circuit button [1] turns off the engine. When pressing this button, the ignition circuit is short-circuited. F
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ENGLISH OPERATION INSTRUMENTS » Choke Dell’Orto carburetor PHVA 14 DS (50SX Junior) Choke lever [1] is mounted to the right side of the carburetor. If you move the choke lever up to the stop, a hole is opened in the carburetor through which the engine can draw in additional fuel. This results in a "rich" fuel-air mixture required for a cold start. Moving the choke lever back closes the hole in the carburetor again. 1 Choke Dell’Orto carburetor PHBG 19 BS (50 SX) Choke control knob [2] is mounted
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OPERATION INSTRUMENTS » Plugin - Stand (50 SX) A socket is provided on the left side of the frame for the plug-in stand [1] included in the scope of supply. 1 Rebound damping function of the shock absorber By using the adjusting screw [2], the degree of damping of the rebound can be adjusted. Turn the knob clockwise to increase damping, turn it counter- clockwise to reduce damping during rebounding. STANDARD ADJUSTMENT: – turn the adjusting screw clockwise to the stop. – then turn the adjusting
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ENGLISH GENERAL TIPS AND WARNINGS FOR STARTING THE MOTORCYCLE » Instructions for the first ride Running in – Make sure the work for the "pre-delivery inspection" was per- – Even very precisely machined sections of engine components formed by your authorized KTM workshop. The DELIVERY have rougher surfaces than components which have been slid- CERTIFICATE and SERVICE MANUAL will be handed over ing across one another for quite some time. Therefore, every when you pick up your vehicle. engine needs
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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 oil leads to premature wear and finally results in destruc- tion of the gear wheels. 2 FUEL 11 Check that there is sufficient fuel in the tank; when closing th
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ENGLISH DRIVING INSTRUCTIONS » 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 throt- tle. – When starting the engine, put on motorcycle boots in order to avoid injuries. You may slip off the kickstarter, or the engine may kick back if 1 you do not kick hard enough. – Do not start the engine and allow it to i
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DRIVING INSTRUCTIONS » Driving The engine speed, and thus the driving speed, are regulated by – Close the fuel tap when leaving the motorcycle. Otherwise the the throttle grip. carburetor may get flooded and fuel will enter the engine. The choke must always be deactivated as soon as the engine has – The side stand or plug-in stand is designed to hold the weight warmed up. of the motorcycle only. By sitting on the motorcycle, your child will put additional weight on the side stand, possibly causi
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ENGLISH PERIODIC MAINTENANCE SCHEDULE » 50 SX JUNIOR 50 SX 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 the clutch engagement speed Check carburetor for a tight fit at intake flange Check intake flange for cracks Check idle setting when engine is warm Check cooling system for leaks, check quantity of antifreeze Check exhaust system for leaks and suspen
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PERIODIC MAINTENANCE SCHEDULE » 50 SX JUNIOR 50 SX ADDITIONAL SERVICE WORK TO BE PERFORMED UNDER A SEPARATE ORDER Check the reed-type intake valve for wear Check the clutch shoes for wear Check the clutch drum for wear Check the water pump shaft and bearings for wear Check the water pump wheel for wear Check the cylinder and piston for wear Check the eccentricity of the crankshaft journal Check the radial clearance of the conrod bearings Check the radial clearance of the piston pi
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ENGLISH MAINTENANCE WORK ON CHASSIS AND ENGINE » Maintenance work and adjustments marked with an asterisk (*) must be performed by an expert. To protect your youngster, always have such work performed by a specialized KTM dealer where your motorcycle will be optimally serviced by appropriately qualified, skilled staff. – When cleaning the motorcycle, do not use a high pressure cleaning unit if possible, otherwise water will penetrate the bearings, carburetor, electric connectors, drum brakes, et
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MAINTENANCE WORK ON CHASSIS AND ENGINE » Checking and adjusting the steering head bearing (50 SX) * 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 upper triple clamp and loosen the steering head screw [2] by a few turns. Lift the triple clamp slightly and turn the adjusting nut [
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ENGLISH MAINTENANCE WORK ON CHASSIS AND ENGINE » 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 driver weighing 25 - 30 kg (wearing full protective clothing). If your child's weight exceeds or falls short of this A range, you will ne
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MAINTENANCE WORK ON CHASSIS AND ENGINE » 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 [1] from the brake caliper and 2 unscrew holding clamp. Measure the projection of the fork legs at the upper 1 fork stabilizer and make a note of the measurement. Loosen the clamping screws [2] on the fork sta
