Changing the fork offset (caster). KTM 250 SX-F, 250 SX-F 2007, 450 SX-F 2007
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MAINTENANCE WORK ON CHASSIS AND ENGINE
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Changing the fork offset (caster) *
The fork offset [A] in the 250/450 SX-F models (center fork legs - center steering head angle) can be set to either 18 or 20 mm. This allows you to optimize the handling to match the race course.
Remove the blind screw [1] to see which offset is set. If the mark [B] is in front, the offset is 18 mm. This setting will deliver more directional stability on fast race courses.
If the mark [B] is in the rear as illustrated, the offset is 20 mm. This setting will deliver better handling in curves.
B
A
The offset is set to 20 mm in the condition at delivery.
1
3 5
4
2
To adjust the offset, dismount the front wheel and remove the front wheel fender.
Remove the screw on the starting number plate. Remove the clamp screws on the hand brake cylinder and fasten the hand brake cylinder to the left fork leg with a cable tie to keep the brake line from kinking (see illustration).
19
5
2
2
4
3
Loosen the clamp screws and take the fork legs out of the triple clamps.
Loosen the collar screw [2] on the lower triple clamp 2 turns.
Remove the blind screw [1] from the upper triple clamp, loosen the clamp screw and upper triple clamp on the seat. Remove the O-ring [3] and the protection ring [4].
Tap gently on the lower triple clamp with a rubber hammer to loosen the steering stem [5] out of the bearing seat. Take the lower triple clamp with the steering stem out of the steering head.
Remove the collar screw from the lower triple clamp and pull out the steering stem. Thoroughly clean all parts. Turn the steering stem 180° and insert it in the triple clamp, tighten the collar screw all the way to the stop.
Grease the steering head bearing and sealing elements.
Be sure to lock the thread on the collar screw [2] with Loctite 243. Do not confuse the collar screw [2] with the blind screw [1]. The collar screw is selflocking.
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Table of contents
- 3 IMPORTANT INFORMATION
- 6 SERIAL NUMBER LOCATIONS
- 6 Chassis number
- 6 Engine number, engine type
- 6 OPERATION INSTRUMENTS
- 6 Clutch lever
- 6 Hot start lever
- 7 Hand brake lever
- 7 Short circuit button
- 7 Starter button (450 SX-F)
- 7 Filler cap
- 7 Fuel tap
- 8 Choke
- 8 Shift lever
- 8 Kickstarter (250 SX-F)
- 8 Foot brake pedal
- 8 Plug in stand
- 9 Compression damping of fork
- 9 Rebound damping of fork
- 9 Compression damping of shock absorber
- 10 Rebound damping of shock absorber
- 11 MOTORCYCLE
- 11 Instructions for initial operation
- 11 Running in the Racing models
- 12 DRIVING INSTRUCTIONS
- 12 Check the following before each start
- 13 Starting when the engine is cold
- 13 Starting when the engine is warm
- 13 What to do when the engine is "flooded
- 14 Starting off
- 14 Shifting/Riding
- 14 Braking
- 14 Stopping and parking
- 15 PERIODIC MAINTENANCE
- 17 MAINTENANCE WORK ON CHASSIS AND ENGINE
- 17 Pivot bearing
- 18 Basic suspension setup for the weight of the driver
- 18 Checking the shock absorber and spring
- 18 Determining the static sag of the shock absorber
- 18 Determining the riding sag of the shock absorber
- 19 Checking the basic setup of the telescopic fork
- 19 Changing the spring preload on the telescopic fork
- 19 Replacing fork springs
- 19 Breather plug front fork
- 19 Cleaning the dust sleeves of the telescopic fork
- 20 Changing the fork offset (caster)
- 21 Checking and adjusting the steering head bearing
- 21 Checking the throttle cable installation
- 22 How to change the handlebar position
- 22 Check chain tension
- 23 Correct chain tension
- 23 sprocket teeth
- 24 Chain maintenance
- 24 Chain wear
- 25 General information about KTM disc brakes
- 26 Adjusting the free travel at the hand brake lever
- 26 Checking the brake fluid level - front brake
- 26 Refilling the front brake fluid reservoir
- 26 Checking the front brake pads
- 27 Replacing the front brake pads
- 27 Checking the rear brake fluid level
- 27 Refilling the rear brake fluid reservoir
- 28 Changing the basic position of the foot brake pedal
- 28 Checking the rear brake pads
- 28 Replacing the rear brake pads
- 29 Dismounting and mounting the front wheel
- 30 Dismounting and mounting the rear wheel
- 30 Checking spoke tension
- 31 Tires, air pressure
- 31 Battery (450 SX-F)
- 32 Charging the battery (450 SX-F)
- 32 Fuse (450 SX-F)
- 33 Cooling system
- 33 Checking the coolant level
- 33 Bleeding the cooling system
- 35 Cleaning the air filter
- 35 Adjusting the throttle cables
- 36 Changing the original position of the clutch lever
- 36 Checking the oil level of the hydraulic clutch
- 36 Bleeding of the hydraulic clutch
- 37 Carburetor - Adjust idling
- 37 Basic information on carburetor wear
- 37 Checking the float level (float height)
- 38 Draining the float chamber of the carburetor
- 38 Checking the engine oil level
- 39 Engine oil
- 39 Changing the engine oil
- 40 Changing the oil filter
- 41 TROUBLESHOOTING
- 43 CLEANING
- 43 STORAGE
- 44 TECHNICAL DATA - ENGINE
- 45 TECHNICAL DATA - CHASSIS
- 48 HEAD WORK INDEX