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ENGLISH

29

MAINTENANCE WORK ON CHASSIS AND ENGINE 

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Dismounting and mounting the rear wheel

Jack the motorcycle up on its frame so that the rear wheel no longer 

touches the ground.

Remove the collar nut 

[1]

, remove the chain tensioner 

[2]

and pull out the

wheel spindle 

[3]

until you can push the rear wheel forwards. 

Take the chain off the rear sprocket, pull out the wheel spindle and carefully

remove the rear wheel from the swing arm.

– Do not operate the rear brake when the rear wheel has been dismounted.

– Make sure the brake disc is always on top when you lay down the wheel,

otherwise the brake disc can be damaged.

– If the axle is dismounted, clean the thread of the wheel spindle and collar

nut thoroughly and apply a new coat of grease to prevent the thread from

jamming.

The rear wheel is remounted in the reverse order. Before tightening the collar

nut to 80 Nm, push the rear wheel forwards so that the chain tensioners lie

on the tension screws.

– If you don’t happen to have a torque wrench at hand, make sure you have

the tightening torque corrected by a KTM dealer as soon as possible. A

loose axle may lead to an unstable driving behavior of your motorcycle.

– After mounting the rear wheel, keep operating the rear brake until the pressure

point returns.

– It is very important to keep the brake disk free from oil and fatty matters,

eitherwise the braking effects would be strongly reduced.

– Tighten the collar nut with the required torque. A loose wheel spindle may

lead to an unstable behavior of your motorcycle.

Checking spoke tension

The correct spoke tension is very important for the stability of the wheels and

thus for riding safety. A loose spoke causes the wheel to become unbalanced

and before long other spokes will have come loose. Check spoke tension, especially

on a new motorcycle, at regular intervals. For checking, tap on each spoke

with the blade of a screwdriver (see photo). A clear tone must be the result.

Dull tones are indicators of loose spokes. If necessary, have the spokes

retightened and the wheel centered by a KTM dealer.

– Spokes can tear if you continue to ride with them loose. This may lead to

an unstable handling of your motorcycle.

– Excessively tensioned spokes may rupture due to local overloading. The

spokes must be tensioned to 4.5-6 Nm.

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Summary of Contents for 250 SX-F 2007

Page 1: ...KTM Sportmotorcycle AG A 5230 Mattighofen www ktm at KTM Group Partner 6 2006 FOTO MITTERBAUER 250 SX F 450 SX F OWNER S MANUAL 2007 ART NR 3 211 146 EN ENGLISH...

Page 2: ...STRIA All rights reserved Reprint also in extracts with written allowance of KTM SPORTMOTORCYCLE AG Mattighofen only We would like to congratulate you on your purchase of a KTM motorcycle You are now...

Page 3: ...e completely ruled out however that minor discrepancies may exist resulting from further design upgrades of these motorcycles This manual is an important part of your motorbike and should be passed on...

Page 4: ...he Owner s Manual or automotive fluids with equivalent specifications must be used in accordance with the maintenance schedule SPARE PARTS ACCESSORIES For your own safety use KTM approved parts and ac...

Page 5: ...sting the steering head bearing 20 Checking the throttle cable installation 20 How to change the handlebar position 21 Check chain tension 21 Correct chain tension 22 Adapting the chain guide to the n...

Page 6: ...TRUMENTS Clutch lever The clutch lever 1 is located on the left side of the handlebar The adjusting screw A is used to change the original position of the clutch lever see maintenance work on chassis...

Page 7: ...and brake lever The hand brake lever 1 is mounted on the handlebars on the right and actuates the front wheel brake The adjusting screw A can be used to change the basic position of the hand brake lev...

Page 8: ...shift lever is mounted on the left side of the engine The position of the gears is shown in the illustration Neutral is located between first and second gear Kickstarter 250 SX F The kickstarter is mo...

Page 9: ...bsorber can synchronize the compression damping in the low and high speed range separately Dual Compression Control Low and high speed refers to the movement of the shock absorber during compression a...

Page 10: ...turn the adjusting screw clockwise to the stop then turn the adjusting screw counterclockwise counting the number of clicks that corresponds to the respective type of shock absorber WP 12 18 7C 03 25...

Page 11: ...al to the positions that are most convenient for you Get used to handling the motorcycle on an empty parking lot or open space before starting on a longer drive Also try to drive as slowly as possible...

Page 12: ...to worst the chain may rupture or the countershaft of the transmission may break 4 TIRES Check for damaged tires Tires showing cuts or dents must be replaced The tread depth must comply with the legal...

Page 13: ...trying again Don t ride your motorcycle with full load and don t rev up the engine when cold because the piston is warming up faster than the water cooled cylinder and can cause engine damage NOTE If...

Page 14: ...ration related noise stop immediately turn the engine off and contact an authorized KTM dealer Braking Close throttle and apply the hand and foot brakes at the same time When driving on sandy wet or s...

Page 15: ...brake foot brake lever z z Check the screws and guide bolts on the brake system for a tight fit z z CHASSIS Check shock absorber and fork for leaks and function z z Clean fork dust bellows z Bleed for...

Page 16: ...0 hours 400 liter every 80 hours 540 liter Check the clutch disks for wear z z z z Check the length of the clutch springs z z z z Check the clutch drive for indentations z z z z Check the outer clutch...

Page 17: ...d adjusting work marked with an asterisk requires expert skills and technical know how For your own safety always have such work performed by a specialized KTM dealer where your motorcycle will be opt...

Page 18: ...le jacked up dimension A 600 mm Motorcycle on ground unloaded dimension B 567 mm Static sag 33 mm If the static sag is lower the spring preload of the shock absorber must be reduced if the static sag...

Page 19: ...stage can remain unchanged The damping rate of the rebound stage can be reduced by a few clicks for a softer spring or increased by a few clicks for a harder spring Breather plug front fork After ever...

Page 20: ...r to the left fork leg with a cable tie to keep the brake line from kinking see illustration Loosen the clamp screws and take the fork legs out of the triple clamps Loosen the collar screw 2 on the lo...

Page 21: ...e a year e g Motorex Long Term 2000 Mount the lower triple clamp upper steering head bearing protection ring O ring upper triple clamp and the blind screw Tighten the collar screw on the lower triple...

Page 22: ...d in the rear The screws 4 must be secured with loctite 243 Check chain tension Jack the motorcycle up on its frame so that the rear wheel no longer touches the ground Press the chain upward at the en...

Page 23: ...have the tightening torque corrected by a KTM dealer as soon as possible A loose axle may lead to an unstable driving behavior of your motorcycle Tighten the collar nut with the required torque NOTE T...

Page 24: ...chain guides for wear and replace if necessary Chain wear To check the chain wear observe the following indications Shift the gear into idling and pull the upper chain strand with approx 10 15 Kilogra...

Page 25: ...ke disk at several points A brake disk worn down to less than 2 50 mm Front 3 50 mm Rear is a safety risk Have the brake disk replaced as soon as it reaches the service limit Have any repairs on the b...

Page 26: ...s case consult an authorized KTM dealer immediately Refilling the front brake fluid reservoir Loosen screws 2 and remove lid 3 and membrane 4 Place hand brake cylinder in a horizontal position and fil...

Page 27: ...he reservoir for the rear brake disk is located on the right side of the motorcycle on the rear brake cylinder No air bubble should be visible in inspection glass A when the vehicle is parked in a ver...

Page 28: ...t put off having your brake pads changed If the brake pads are replaced too late so that the lining is partly or entirely worn the steel components of the brake pad will rub against the brake disc the...

Page 29: ...ist Hold the front wheel pull out the wheel spindle 4 Carefully remove the front wheel from the fork Do not operate the hand brake when the front wheel has been dismounted Make sure the brake disc is...

Page 30: ...rque corrected by a KTM dealer as soon as possible A loose axle may lead to an unstable driving behavior of your motorcycle After mounting the rear wheel keep operating the rear brake until the pressu...

Page 31: ...e battery is located under the seat and is maintenance free Maintenance free means you will not need to check the acid level Clean the battery terminals regularly and grease with acid free grease if n...

Page 32: ...board electronic system always disconnect the minus pole before you charge the battery To charge connect the battery to the battery charger before you switch on the battery charger When the battery is...

Page 33: ...ely and consult doctor A mixture of 50 antifreeze liquid and 50 destilled water is used as coolant However the antifreeze protection must be at least 25 C 13 F This mixture offers antifreeze protectio...

Page 34: ...move all screws take off the cap 1 and outer pipe 2 Pull the glass fiber yarn packing 3 out of the inner pipe 4 Clean all parts thoroughly Slide a new glass fiber yarn packing over the inner pipe Moun...

Page 35: ...r any circumstances Oil the dry air filter with a high grade filter oil Also clean the air filter box Check the carburetor collar for damage and that it is filled correctly Place the air filter on the...

Page 36: ...in contact with paint it is an effective paint remover Use only clean brake fluid taken from a tightly sealed container 450 SX F if necessary fill up with biodegradable hydraulic oil SAE 10 e g Motor...

Page 37: ...heat up more when used in competitions NOTE If you fail to obtain a satisfying result by following the procedure described above an incorrectly dimensioned idling nozzle may be the cause If a the mixt...

Page 38: ...ber Then tighten the drain plug and open the fuel tap Fuel is easily flammable and toxic When handling fuel be sure to exercise the utmost caution Never perform any work on the fuel system near open f...

Page 39: ...ce the entire oil has been drained clean the sealing surface mount the plug together with the sealing ring and tighten it to 20 Nm CLEANING THE SHORT OIL SCREEN 250 SX F AND OIL SCREEN 450 SX F The oi...

Page 40: ...e motorcycle on its side and fill the oil filter housing about halfway with engine oil Fill oil filter with oil place the oil filter in the filter box Grease the O ring 3 of the oil filter cover and m...

Page 41: ...d cleaning if no fuel leaks out check tank ventilation i e clean fuel tap Clean and dry the spark plug or exchange it respectively Clean and dry the spark plug or exchange it respectively Adjust spark...

Page 42: ...ffient fuel Engine takes air out of control Clean and check fuel system and carburettor Check rubber sleeve and carburetor for tight fit Engine gets too hot Insufficient cooling liquid Not enough air...

Page 43: ...engine oil contains aggressive contaminants Check antifreeze and amount of cooling liquid Warm up the engine once again close the fuel cock and wait until the engine dies Then open the drain plug of t...

Page 44: ...ion with 2 rotor pumps Engine oil full synthetic oil see below Quantity of engine oil 1 1 liters 1 3 liters Primary drive 22 68 29 74 Transmission claw shifted 6 speed 4 speed 1st gear 13 32 17 32 2nd...

Page 45: ...er clutch hub 250 SX F M18x1 5 Loctite 243 120 Nm Nut for inner clutch hub 450 SX F M18x1 5 Loctite 243 80 Nm Hexagon collar screw clutch spring M6 10 Nm Allan head screw shift roller locking piece M6...

Page 46: ...F 450 SX F Frame Central tube chrome moly steel frame Fork WP 4860 CC MA Wheel travel front rear 300 335 mm Rear suspension WP PDS shock absorber 5018 DCC aluminium swing arm Front brake Disk brake w...

Page 47: ...rew bottom M 20x1 5 Loctite 243 60 Nm Collar nut swing arm bolt M16x1 5 100 Nm Hexagon collar screw handlebar clamp M8 20 Nm Allan head screw handlebar support M10 Loctite 243 40 Nm Shock absorber top...

Page 48: ...ping of fork 8 Cooling system 32 Correct chain tension 22 Damping action during compression of shock absorber 8 Determining the riding sag of the shock absorber 17 Determining the static sag of the sh...

Page 49: ...AM 7 0 0 2 F X S 0 5 2 6 0 0 2 4 0 8 0 p u k c i p G 3 r o t a r e n e g n o t t u b p o t s C D I l i o c n o i t i n g i 0 0 0 2 3 0 9 3 4 9 5 s s e n r a h I D C red white red black d e r n e e r g...

Page 50: ...t a l u g e r G 3 r o t a r e n e g 0 0 0 2 3 0 9 3 3 7 7 s s e n r a h I D C 0 0 0 9 7 0 1 1 3 7 7 s s e n r a h t r a t s s s e n r a h t r a t s s s e n r a h I D C e t i h w e u l b n w o r b k c...

Page 51: ...reur Motor de arranque el ctrico Stop button Not Aus Schalter Interrutore di aresto d mergenza Bouton d arr t d urgence Interruptor de parada de emergencia Throttle position sensor TPS Vergaserpotenti...

Page 52: ...KTM Sportmotorcycle AG A 5230 Mattighofen www ktm at KTM Group Partner 6 2006 FOTO MITTERBAUER 250 SX F 450 SX F BEDIENUNGSANLEITUNG 2007 ART NR 3 211 146 DE DEUTSCH...

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