KTM 50 SX PRO SENIOR LC User manual

OWNER'S MANUAL 2009
50 SX
50 SX Junior
50 SX Mini
ART. NO. 3211344en

DEAR KTM CUSTOMER 1
DEAR KTM CUSTOMER
Congratulations on your decision to purchase a KTM motorcycle. You are now the owner of a state-of-the-art sports motorcycle that will
give you and your child enormous pleasure if you service and maintain it accordingly.
We wish you great pleasure riding the vehicle!
Enter the serial numbers of your vehicle below.
Chassis number ( p. 9) Dealer's stamp
Engine number ( p. 9)
The owner's manual corresponded to the latest state of this series at the time of printing. Slight deviations resulting from continuing
development and design can, however, not be completely excluded.
All specifications are non-binding. KTM Sportmotorcycle AG specifically reserves the right to modify or delete technical specifica-
tions, prices, colors, forms, materials, services, designs, equipment, etc., without prior notice and without specifying reasons, to adapt
these to local conditions, as well as to stop production of a particular model without prior notice. KTM accepts no liability for delivery
options, deviations from illustrations and descriptions, as well as printing and other errors. The models portrayed partly contain special
equipment that does not belong to the regular scope of delivery.
© 2008 by KTM-Sportmotorcycle AG, Mattighofen Austria
All rights reserved
Reproduction, even in part, is permitted only with the express written permission of the copyright owner.
ISO 9001(12 100 6061)
According to the international quality management standard ISO 9001, KTM uses quality assurance processes that lead
to the maximum possible quality of the products.
Issued by: TÜV Management Service
KTM-Sportmotorcycle AG
5230 Mattighofen, Austria

CONTENTS 2
CONTENTS
MEANS OF REPRESENTATION ............................................ 4
IMPORTANT NOTES............................................................ 5
VIEW OF VEHICLE............................................................... 7
View of the vehicle from the left front (example)................. 7
View of the vehicle from the right rear (example) ................ 8
LOCATION OF SERIAL NUMBERS ........................................ 9
Chassis number............................................................... 9
Engine number................................................................ 9
Shock absorber part number............................................. 9
CONTROLS....................................................................... 10
Throttle grip.................................................................. 10
Hand brake lever ........................................................... 10
Short circuit button ....................................................... 10
Fuel tap........................................................................ 10
Opening filler cap.......................................................... 10
Closing filler cap ........................................................... 11
Opening oil tank cap (50 SX Mini) .................................. 11
Closing oil tank cap (50 SX Mini).................................... 11
Choke (50 SX)............................................................... 11
Choke (50 SX Junior, 50 SX Mini)................................... 11
Kickstarter.................................................................... 12
Foot brake pedal ........................................................... 12
Plug-in stand ................................................................ 12
GENERAL TIPS AND HINTS ON PUTTING INTO
OPERATION...................................................................... 13
Advice on first use......................................................... 13
Running in the engine.................................................... 14
RIDING INSTRUCTIONS .................................................... 15
Checks before putting into operation ............................... 15
Starting ........................................................................ 15
Starting up ................................................................... 16
Shifting, riding.............................................................. 16
Braking ........................................................................ 16
Stopping, parking .......................................................... 16
Refueling...................................................................... 17
Filling up with oil (50 SX Mini)....................................... 17
SERVICE SCHEDULE......................................................... 19
Important maintenance work to be carried out by an
authorized KTM workshop. ............................................. 19
Important maintenance work to be carried out by an
authorized KTM workshop. (as additional order)................ 20
Performance of urgent inspection and care work by the
supervisory individual. ................................................... 20
MAINTENANCE WORK ON CHASSIS AND ENGINE.............. 21
Jacking up the motorcycle.............................................. 21
Removing the motorcycle from the work stand.................. 21
Adjusting the rebound damping of the shock absorber....... 21
Measuring rear wheel sag unloaded ................................. 21
Checking the static sag of the shock absorber .................. 22
Adjusting the spring preload of the shock absorber x...... 22
Removing the shock absorber x..................................... 23
Installing shock absorber x........................................... 23
Vehicle level ................................................................. 23
Adjusting upper fork projection x.................................. 24
Adjusting seat height x................................................ 24
Cleaning dust boots of fork legs ...................................... 24
Checking play of steering head bearing............................ 25
Adjusting play of steering head bearing x....................... 25
Removing the fork legs x.............................................. 27
Installing the fork legs x............................................... 27
Removing the lower triple clamp x................................ 28
Installing the lower triple clamp x................................. 29
Greasing the steering head bearing x............................. 30
Dismounting the front fender.......................................... 30
Installing the front fender............................................... 30
Dismount the start number plate..................................... 31
Installing the start number plate ..................................... 31
Handlebar position ........................................................ 31
Adjusting handlebar position x...................................... 32
Checking play in gas Bowden cable ................................. 32
Adjusting play in gas Bowden cable x............................ 32
Checking chain dirt ....................................................... 33
Cleaning the chain......................................................... 33
Checking the chain tension ............................................ 33
Checking the chain tension - installing rear wheel............. 34
Checking rear sprocket / engine sprocket for wear ............. 34
Adjusting chain tension.................................................. 34
Adjusting chain tension - after checking .......................... 35
Adjusting chain tension - installing rear wheel.................. 35
Adjusting the chain guide x.......................................... 35
Checking brake discs ..................................................... 36
Checking play of handbrake lever .................................... 36
Adjusting play of handbrake lever.................................... 36
Adjusting basic position of handbrake lever...................... 36
Checking front brake fluid level....................................... 37
Adding front brake fluid x............................................ 37
Checking the front brake linings...................................... 38
Removing front brake linings x..................................... 38
Installing the front brake linings x................................. 39
Changing the front brake linings x................................. 39
Checking free play of foot brake lever .............................. 40
Adjusting basic position of foot brake pedal x................ 40
Checking rear brake fluid level........................................ 41
Adding rear brake fluid x.............................................. 41
Checking rear brake linings ............................................ 42
Removing rear brake linings x....................................... 42
Installing the rear brake linings x.................................. 42
Changing the rear brake linings x.................................. 43
Removing front wheel x................................................ 44
Installing the front wheel x........................................... 44
Removing rear wheel x................................................. 45
Installing the rear wheel x............................................ 45
Tire condition checking.................................................. 45
Checking tire air pressure............................................... 46
Checking spoke tension.................................................. 46
Removing the seat......................................................... 46
Mounting the seat ......................................................... 47
Cooling system .............................................................. 47
Checking antifreeze and coolant level.............................. 47
Checking the coolant level.............................................. 48
Draining the coolant x.................................................. 48
Refilling coolant x....................................................... 49
Removing main silencer ................................................. 49
Installing the main silencer ............................................ 50
Glass fiber yarn filling of main silencer ............................ 50
Removing the glass fiber yarn filling of the main
silencer x................................................................... 50
Installing the glass fiber yarn filling of the main
silencer x................................................................... 50
Removing the air filter x............................................... 51
Installing the air filter x............................................... 51
Cleaning air filter x...................................................... 51

CONTENTS 3
Carburetor - idle (50 SX) ................................................ 52
Carburetor - idle (50 SX Junior, 50 SX Mini) .................... 52
Carburetor - adjusting idle x(50 SX) ............................. 52
Carburetor - adjusting idle x(50 SX Junior,
50 SX Mini) .................................................................. 53
Checking oil level (50 SX Mini)....................................... 54
Bleeding the oil pump x(50 SX Mini) ........................... 54
Checking gear oil level ................................................... 55
Changing the gear oil x................................................ 55
Draining the gear oil x................................................. 55
Filling up with gear oil x.............................................. 56
Adding gear oil x......................................................... 56
Checking clutch engagement speed x............................ 57
Adjusting clutch engagement speed x........................... 57
Removing centrifugal clutch x...................................... 57
Fitting centrifugal clutch x........................................... 58
Checking/measuring clutch x........................................ 59
Dismantling centrifugal clutch x................................... 59
Assembling centrifugal clutch x.................................... 59
TROUBLESHOOTING......................................................... 61
CLEANING........................................................................ 63
Cleaning motorcycle ...................................................... 63
STORAGE ......................................................................... 64
Storage......................................................................... 64
Putting into operation after storage ................................. 64
TECHNICAL DATA - ENGINE.............................................. 65
Capacity - gear oil.......................................................... 65
Capacity - coolant.......................................................... 65
TECHNICAL DATA - ENGINE TIGHTENING TORQUES.......... 66
TECHNICAL DATA - CARBURETOR..................................... 67
50 SX........................................................................... 67
50 SX Junior................................................................. 67
50 SX Mini ................................................................... 67
TECHNICAL DATA - CHASSIS ............................................ 68
Tires ............................................................................ 69
Capacity - fuel............................................................... 69
TECHNICAL DATA - FORK.................................................. 70
50 SX........................................................................... 70
50 SX Junior................................................................. 70
50 SX Mini ................................................................... 70
TECHNICAL DATA - SHOCK ABSORBER ............................. 71
50 SX........................................................................... 71
50 SX Junior................................................................. 71
50 SX Mini ................................................................... 71
TECHNICAL DATA - CHASSIS TIGHTENING TORQUES ........ 72
SUBSTANCES................................................................... 73
AUXILIARY SUBSTANCES.................................................. 75
STANDARDS..................................................................... 77
INDEX .............................................................................. 78

MEANS OF REPRESENTATION 4
Symbols used
The symbols used are explained in the following.
Indicates an expected reaction (e.g. of a work step or a function).
Indicates an unexpected reaction (e.g. of a work step or a function).
All work marked with this symbol requires specialist knowledge and technical understanding. In the interest of
your own safety, have these jobs done in an authorized KTM workshop! There, your motorcycle will be serviced
optimally by specially trained experts using the specialist tools required.
Identifies a page reference (more information is provided on the specified page).
Formats used
The typographical and other formats used are explained in the following.
Proper name Identifies a proper name.
Name®Identifies a protected name.
Brand™ Identifies a brand in merchandise traffic.

IMPORTANT NOTES 5
Use definition
KTM sport motorcycles are designed and built to withstand the normal stresses and strains of competitive use. The motorcycles com-
ply with currently valid regulations and categories of the top international motorsport organizations.
Info
The motorcycle must be used only in closed off areas remote from public road traffic.
Maintenance
A prerequisite for perfect operation and prevention of wear is that the engine and chassis maintenance and adjustment work described
in the owner's manual are properly carried out. Poor adjustment and tuning of the engine and chassis can lead to damage and break-
age of components.
Using the motorcycle in extreme conditions such as very muddy or wet terrain can lead to above-average wear of components such as
the transmission train or the brakes. For this reason, it may be necessary to service or replace worn parts before the limit specified in
the service schedule is reached.
Pay careful attention to the prescribed running-in period, inspection and maintenance intervals. If you observe these exactly, you will
ensure a much longer service life for your motorcycle.
Warranty
The work prescribed in the service schedule must be carried out in an authorized KTM workshop only and confirmed in the customer's
service record, since otherwise no warranty claims will be honored. No warranty claims can be honored for damage resulting from
manipulations and/or alterations to the vehicle.
Fuel, oils, etc.
You should use the fuels, oils and greases according to specifications as listed in the owner's manual.
Spare parts, accessories
For your own safety, only use spare parts and accessory products that have been approved and/or recommended by KTM and have
them installed in an authorized KTM workshop. KTM accepts no liability for other products and any resulting damage or loss.
The current KTM PowerParts for your vehicle can be found on the KTM website.
International KTM Website: http://www.ktm.com
Work rules
During assembly, non-reusable parts (e.g. self-locking screws and nuts, seals, seal rings, O-rings, pins, lock washers) must be replaced
by new parts.
If a thread locker is used for the screw connections (e.g. Loctite®), follow the specific manufacturer instructions regarding its use.
Parts that are to be reused after disassembly must be cleaned and checked for damage and wear. Change damaged or worn parts.
After repair and maintenance, ensure that the vehicle is roadworthy.
Transport
Note
Danger of damage The parked vehicle can roll away or fall over.
–Always place the vehicle on a firm and even surface.
Note
Fire hazard Some vehicle components get very hot when the machine is driven.
–Do not place the vehicle where there are flammable or explosive substances. Do not place objects over the vehicle while it is still
warm from being run. Always let the vehicle cool first.
–Switch off the engine.
–Use straps or other suitable devices to secure the motorcycle against accidents or falling over.

IMPORTANT NOTES 6
Environment
Motorcycling is a wonderful sport and we naturally hope that you and your child will be able to enjoy it to the fullest. However, it is a
potential problem for the environment and can lead to conflicts with other persons. But if you use your motorcycle responsibly, you
can ensure that such problems and conflicts do not have to occur. To protect the future of motorcycle sport, make sure that your child
uses the motorcycle legally, display environmental consciousness, and respect the rights of others.
Notes/warnings
Pay close attention to the notes/warning.
Info
Various information and warning labels are affixed to the vehicle. Do not remove information/warning labels. If they are miss-
ing, you or others may not recognize dangers and may therefore be injured.
Grades of risks
Danger
Identifies a danger that will immediately and invariably lead to fatal or serious permanent injury if the appropriate measures
are not taken.
Warning
Identifies a danger that is likely to lead to fatal or serious injury if the appropriate measures are not taken.
Note
Identifies a danger that will lead to considerable machine and material damage if the appropriate measures are not taken.
Warning
Identifies a danger that will lead to environmental damage if the appropriate measures are not taken.
Owner's manual
–Carefully read this owner's manual in its entirety together with your child before letting your child ride the motorcycle for the first
time. It contains a lot of information and tips to help you and your child operate and handle the motorcycle. Only then will you
find out how to customize the motorcycle ideally for your child's use and how to protect your child from injury. The owner's manual
also contains important information on servicing the motorcycle.
–The owner's manual is an important component of the motorcycle and should be handed over to the new owner if the vehicle is
sold.

VIEW OF VEHICLE 7
3.1View of the vehicle from the left front (example)
700526-01
1 Hand brake lever
2 Filler cap
3 Fuel tap
4 Quick release for seat lock
5 Shock absorber compression adjustment
6 Chain guide
7 Plug-in stand

VIEW OF VEHICLE 8
3.2View of the vehicle from the right rear (example)
700527-01
1 Short circuit button
2 Chassis number
3 Throttle grip
4 Level viewer for brake fluid, rear
5 Foot brake pedal
6 Kickstarter

LOCATION OF SERIAL NUMBERS 9
4.1Chassis number
700460-01
The chassis number is stamped on right of the steering head.
4.2Engine number
700461-01
The engine number is stamped on the left side of the engine under the engine
sprocket.
4.3Shock absorber part number
700469-01
The shock absorber part number is stamped on the top of the shock absorber above
the adjusting ring towards the rear.

CONTROLS 10
5.1Throttle grip
700470-01
Trottle grip is fitted on the right side of the handlebar.
5.2Hand brake lever
700471-01
Hand brake lever is fitted on the right side of the handlebar.
The hand brake lever is used to activate the front brake.
5.3Short circuit button
700462-01
Short circuit button is fitted on the left side of the handlebar.
Possible states
• Short circuit button in basic position –In this position, the ignition circuit is
closed, and the engine can be started.
• Short circuit button pressed –In this position, the ignition circuit is interrupted,
a running engine stops, and a non-running engine will not start.
5.4Fuel tap
700463-01
Fuel tap is on the left of the fuel tank.
Possible states
• Fuel tap is closed –The knurled screw is turned all the way clockwise. Fuel cannot
flow out of the fuel tank.
• Fuel tap is open –The knurled screw is turned all the way counterclockwise. Fuel
can flow out of the fuel tank.
5.5Opening filler cap
700465-10
–Turn the tank cap counterclockwise and pull it up.

CONTROLS 11
5.6Closing filler cap
700465-11
–Put the tank cap on and turn it clockwise.
Info
Run the fuel tank breather hose without kinks.
5.7Opening oil tank cap (50 SX Mini)
700517-01
–Turn the oil tank cap counterclockwise and pull it up.
5.8Closing oil tank cap (50 SX Mini)
700517-10
–Put the oil tank cap on and turn it clockwise.
Info
Run the oil tank breather hose without kinks.
5.9Choke (50 SX)
700464-01
Choke lever is fitted on the left side of the carburetor.
Activating the choke function frees an opening through which the engine can draw
extra fuel. This gives a richer fuel-air mixture, which is needed for a cold start.
Info
If the engine is warm, the choke function must be deactivated.
Possible states
• Choke function activated –The choke lever is in the upper position. The O-ring is
visible.
• Choke function deactivated –The choke lever is in the lower position. No O-ring is
visible.
5.10Choke (50 SX Junior, 50 SX Mini)
700519-01
Choke lever is fitted on the right side of the carburetor.
Activating the choke function frees an opening through which the engine can draw
extra fuel. This gives a richer fuel-air mixture, which is needed for a cold start.
Info
If the engine is warm, the choke function must be deactivated.
Possible states
• Choke function activated –The choke lever is pushed up all the way.
• Choke function deactivated –The choke lever is pushed down all the way.

CONTROLS 12
5.11Kickstarter
700472-01
The kickstarter is fitted on the right of the engine.
The kickstarter can be swiveled.
Info
Before riding, swing the kickstarter inwards towards the engine.
5.12Foot brake pedal
700473-01
Foot brake pedal is located in front of the right footrest.
The foot brake pedal is used to activate the rear brake.
5.13Plug-in stand
700474-01
Note
Danger of damage The parked vehicle can roll away or fall over.
–Always place the vehicle on a firm and even surface.
To park the motorcycle, insert the plug-in stand in the support for the plug-in stand
on the left of the vehicle.
Info
Remove the plug-in stand before riding.

GENERAL TIPS AND HINTS ON PUTTING INTO OPERATION 13
6.1Advice on first use
Warning
Danger of accidents Physical and mental readiness of a child.
–Your child must be able to ride a bicycle and must be able to erect the vehicle independently after a fall. In addition, your
child must understand the regulations and instructions from you or from other guardians. Do not ask too much of your
child; participation in a race should not be considered until your child's stamina, riding techniques and motivation are at
the necessary levels. Children often underestimate or fail to recognize dangerous situations; make it clear to your child that
it should not, under any circumstances, operate the vehicle without supervision and that your child may only drive at
speeds that are commensurate with the child's riding abilities and the road conditions.
–Only let your child ride on the vehicle if it is physically and mentally ready to operate the vehicle.
Warning
Risk of injury Missing or poor protective clothing present an increased safety risk.
–Wear protective clothing (helmet, boots, gloves, pants and jacket with protectors) every time you ride the motorcycle. You
and your child should always used protective clothing that is in good condition and meets the legal requirements. When
you ride a motorcycle, set an example for your child and wear suitable protective clothing.
Warning
Danger of crashing Impairment of riding behavior due to different tire tread patterns on front and rear wheels.
–The front and rear wheels must be fitted with tires with similar tread patterns to prevent loss of control over the vehicle.
Warning
Danger of accidents Critical riding behavior due to inappropriate riding.
–Ensure that your child adjusts the riding speed to the road conditions and to his or her riding abilities.
Warning
Danger of accidents Accident risk caused by presence of a passenger.
–Your vehicle is not designed to carry passengers. Do not ride with a passenger.
Warning
Danger of accidents Brake system failure.
–If the foot brake pedal is not released, the brake linings drag permanently. The rear brake can fail due to overheating.
Ensure that your child raises his or her foot from the foot brake pedal when the child does not want to brake.
Warning
Danger of accidents Destruction of chassis components.
–Do not exceed the maximum allowable rider weight.
Warning
Risk of misappropriation Usage by unauthorized persons.
–Never leave the vehicle while the engine is running. Secure the vehicle against use by unauthorized persons.
Info
When using your motorcycle, remember that others may feel disturbed by excessive noise.
–Make sure that the pre-delivery inspection work has been carried out by an authorized KTM workshop.
You receive a delivery certificate and the service record at vehicle handover.
–Carefully read the entire owner's manual together with your child before going for the first ride.
Info
Pay special attention to the safety warnings and injury risks.
Explain to your child the techniques of riding and falling, e.g. how shifting weight can influence handling characteristics.
–Familiarize your child with the controls.
–Adjust the basic position of the handbrake lever. ( p. 36)
–Adjust the basic position of the foot brake pedal. x( p. 40)
–Before using the vehicle for the first time, ensure that the basic settings of the chassis are suitable for the weight of your child.

GENERAL TIPS AND HINTS ON PUTTING INTO OPERATION 14
–Accustom your child to the handling of the motorcycle on suitable terrain, preferably on a large open meadow.
Info
To give your child a feel for the brake, you should push your child at first. Do not start the engine until your child can is
able to apply the necessary brake pressure.
Initially, let your child drive to another person who can help your child stop and turn.
–Erect obstacles for your child to navigate around to accustom your child to handling the vehicle.
–Your child should also try to ride as slowly as possible and in a standing position to get a better feeling for the vehicle.
–Do not let your child ride on terrain that exceed your child's capabilities and experience.
–Your child should hold the handlebar firmly with both hands and keep his or her feet on the footrests when riding.
–Do not exceed the maximum allowable rider weight.
Requirement
Maximum rider weight < 35 kg (< 77 lb.)
Maximum rider size < 130 cm (< 51.2 in)
–Run the engine in. ( p. 14)
6.2Running in the engine
–During the running-in phase, do not exceed the specified engine performance.
Requirement
Maximum engine performance
During the first 3 service hours < 70 %
During the first 5 service hours < 100 %
–Avoid fully opening the throttle!

RIDING INSTRUCTIONS 15
7.1Checks before putting into operation
Info
Make sure that the motorcycle is in a perfect technical condition before use.
Info
In the interests of riding safety, make it your own and your child's habit to perform a general check before going for a ride.
Insist that your child perform the general checks himself or herself.
–Check the gear oil level. ( p. 55)
(50 SX Mini)
–Check the oil level. ( p. 54)
–Check the chain tension. ( p. 33)
–Check the chain dirt accumulation. ( p. 33)
–Check the tire condition. ( p. 45)
–Check the tire air pressure. ( p. 46)
–Check the front brake brake fluid level. ( p. 37)
–Check the rear brake fluid level. ( p. 41)
–Check the front brake linings. ( p. 38)
–Check the rear brake linings. ( p. 42)
–Check the function of the brake system.
–Check the coolant level. ( p. 48)
–Check the settings of all controls and ensure that they can be operated smoothly.
–Check the functioning of the electrical equipment.
7.2Starting
Danger
Danger of poisoning Exhaust gases are poisonous and can result in unconsciousness and/or death.
–When running the engine, always make sure there is sufficient ventilation, and do not start or run the engine in a closed
space without an effective exhaust extraction system.
Note
Engine failure High engine speeds in cold engines have a negative effect on the service life of the engine.
–Always warm up the engine at low engine speeds.
Info
If the motorcycle is unwilling to start, the cause can be old fuel in the float chamber. The flammable elements of the fuel
evaporate after a long time of standing.
If the float chamber is filled with fresh fuel, the engine starts immediately.
–Turn the knurled screw on the fuel tap all the way counterclockwise.
Fuel can flow from the fuel tank to the carburetor.
–Remove the motorcycle from the stand.
The engine is cold
(50 SX)
–Pull up the choke lever as far as possible and turn it max. ¼ of a turn.
(50 SX Junior, 50 SX Mini)
–Push the choke lever up all the way.
–Forcefully step on the kickstarter, pushing it all the way forward.
Info
Do not open the throttle.

RIDING INSTRUCTIONS 16
7.3Starting up
Info
The plug-in stand must be removed before you start your journey.
–Open the throttle carefully.
7.4Shifting, riding
Info
If you hear unusual noises while riding, stop immediately, switch off the engine and contact an authorized KTM workshop.
–If the choke function was activated, deactivate it after the engine has warmed up.
–When you reach maximum speed after fully opening the throttle, turn back the throttle to about ¾ of its range. The speed hardly
drops, but the fuel consumption falls considerably.
–Your child should always open the throttle only as much as the engine can handle –abruptly opening the throttle increases fuel
consumption.
–Your child should switch off the engine if he or she expects to be standing for a long time.
Requirement
≥2 min
7.5Braking
Warning
Danger of accidents If you brake too hard, the wheels can lock.
–Adapt your braking to the traffic situation and the road conditions.
Warning
Danger of accidents Reduced braking caused by spongy pressure point of front or rear brake.
–Have the brake system checked in an authorized KTM workshop, and do not ride any further.
Warning
Danger of accidents Reduced braking due to wet or dirty brakes.
–Clean or dry dirty or wet brakes by riding and braking gently.
–On sandy, wet or slippery surfaces, use the rear brake.
–Braking should always be completed before you go into a bend.
7.6Stopping, parking
Warning
Risk of misappropriation Usage by unauthorized persons.
–Never leave the vehicle while the engine is running. Secure the vehicle against use by unauthorized persons.
Warning
Danger of burns Some vehicle components get very hot when the machine is driven.
–Do not touch hot components such as exhaust system, radiator, engine, shock absorber and brakes. Allow these compo-
nents to cool down before starting work on them.
Note
Danger of damage The parked vehicle can roll away or fall over.
–Always place the vehicle on a firm and even surface.
Note
Fire hazard Some vehicle components get very hot when the machine is driven.
–Do not place the vehicle where there are flammable or explosive substances. Do not place objects over the vehicle while it is still
warm from being run. Always let the vehicle cool first.

00
0
AA
RIDING INSTRUCTIONS 17
Note
Material damage Damage and destruction of components due to excessive load.
–The plug-in stand is designed for the weight of the motorcycle only. You or your child should not sit on the motorcycle when it is
standing on the plug-in stand. The plug-in stand and/or the frame could be damaged and the motorcycle could fall over.
–Brake the motorcycle.
–Press and hold the short circuit button while the engine is idling until the engine stops.
–Turn the knurled screw on the fuel tap all the way clockwise.
–Park the motorcycle on firm ground.
7.7Refueling
Danger
Fire hazard Fuel can easily catch fire.
–Never fill up the vehicle near open flames or burning cigarettes, and always switch off the engine first. Be careful that no
fuel is spilt, especially on hot vehicle components. Clean up spilt fuel immediately.
–Fuel in the fuel tank expands when warm and can escape if the tank is overfilled. See specifications on filling up with fuel.
Warning
Danger of poisoning Fuel is poisonous and a health hazard.
–Avoid contact between fuel and skin, eyes and clothing. Do not inhale fuel vapors. If fuel gets into your eyes, rinse imme-
diately with water and contact a doctor. Wash affected skin areas immediately with soap and water. If fuel is swallowed,
contact a doctor immediately. Change clothing that has come into contact with fuel.
Warning
Environmental hazard Improper handling of fuel is a danger to the environment.
–Do not allow fuel to get into the ground water, the ground, or the sewage system.
–Switch off the engine.
–Open the filler cap. ( p. 10)
400214-10
–Fill the fuel tank with fuel up to measurement .
Requirement
Measurement of 35 mm (1.38 in)
Fuel tank
capacity, approx.
(50 SX Mini)
2.0 l (2.1 qt.) Super unleaded (ROZ 95 / RON 95 /
PON 91) ( p. 74)
Fuel tank
capacity,
approx. (50 SX,
50 SX Junior)
2.3 l (2.4 qt.) Super unleaded gasoline, mixed with
2-stroke engine oil ( p. 74)
–Close the filler cap. ( p. 11)
7.8Filling up with oil (50 SX Mini)
Warning
Engine failure If the vehicle is run without 2-stroke oil in the tank, the result is engine failure.
–The oil tank must always be filled up to the MIN mark.
–Switch off the engine.
–Open the oil tank cap. ( p. 11)

RIDING INSTRUCTIONS 18
700518-01
–Fill the oil tank at least up to the MIN mark .
Requirement
MIN mark Sufficient for a single tank filling
Oil tank contents
ca.
0.2 l (0.2 qt.) 2-stroke engine oil ( p. 73)
–Close the oil tank cap. ( p. 11)