KTM 250 SX - Manual (Page 89)

Repair manual KTM 250 / 300 / 380
Art No 3206004 -E
9-6C
250/380SX 250/300/380 MXC 250/300/380 EXC 250/300/380 EGS
Frame Central chrome-moly-steel frame
Fork WP Extreme Ø 50 mm
Wheel travel front/rear 280 / 320 mm (11.0 / 12.6 in)
Rear suspension WP Progressive Damping System shock absorber, aluminium swingarm
Front brake Disc brake with carbon-steel brake disc Ø 260 mm (10.2 in), brake caliper floated
Rear brake Disc brake with carbon-steel brake disc Ø 220 mm (8.7 in), brake caliper floated
Front tires 80/100 - 21“ 51M 80/100 - 21“ 51M 90/90 - 21“ 54R 90/90 - 21“ 54R
– – 80/100 - 21“ 51M –
Air pressure offroad 1.0 bar (14 psi) 1.0 bar (14 psi) 1.0 bar (14 psi) 1.0 bar (14 psi)
Air press. road driver only – – 1.5 bar (21 psi) 1.5 bar (21 psi)
Rear tires 110/90 - 19“ 62M 110/100 - 18“ 64M 140/80 - 18“ 70R 140/80 - 18“ 70R
– – 110/100 - 18“ 64M –
Air pressure offroad 1.0 bar (14 psi) 1.0 bar (14 psi) 1.0 bar (14 psi) 1.0 bar (14 psi)
Air press. road driver only – – 2.0 bar (28 psi) 2.0 bar (28 psi)
Fuel tank capacity 7.5 liter 12 liter 9.5 or 12 liter 9.5 or 12 liter
(2 US gallons) (3.2 US gallons) (2.5 or 3.2 US gallons) (2.5 or 3.2 US gallons)
Final drive ratio 14:50 14:52 14:50 / 14:52 14:50 / 15:48
Chain 5/8 x 1/4"
Available final sprockets 38, 40, 42, 45, 48, 50, 52
Steering head angle 63.5°
Wheel base 1481 ± 10 mm (58.3 ± 0.4 in)
Seat height, unloaded 925 mm (36.4 in)
Ground clearance, unloaded 385 mm (15 in)
Dead-weight without fuel 101 kg (223 lbs) 102.5 kg (226.3 lbs) 103.7 kg (229 lbs) 109 kg (240.6 Ibs)
TECHNICAL SPECIFICATIONS CHASSIS 250 / 300 / 380 SX / MXC / EXC / EGS ‘99
WP 918T768 WP 918T769
Compression adjuster 12 12
Rebound adjuster 12 12
Spring 4.2 N/mm 4.0 N/mm
Spring preload 5 mm (0.2 in) 5 mm (0.2 in)
Air chamber length 150 mm (5.9 in) 155 mm (6.1 in)
Capacity per fork leg approx. 750 ccm approx. 750 ccm
Fork oil SAE 5 SAE 5
STANDARD ADJUSTMENT - FORK
NOTE:
The damping units in the left and the right fork leg are of
different design. Make sure not to mix them up in case of
repair or service jobs.
Collar bolt front wheel spindle M 10 40 Nm (30 ft.lb)
Brake caliper front M 8 25 Nm (19 ft.lb)
+ Loctite 243
Clamping bolts upper fork bridge M 8 15 Nm (11 ft.lb)
Clamping bolts lower fork bridge M 8 20 Nm (15 ft.lb)
Clamping bolts fork stubs M 8 15 Nm (11 ft.lb)
Collar nut rear wheel spindle M 20x1,5 80 Nm (59 ft.lb)
Hexagon nut swing arm bolt M 14x1,5 100 Nm (74 ft.lb)
Shock absorber top M 12 60 Nm (44 ft.lb)
Shock absorber bottom M 12 40 Nm (30 ft.lb)
Other bolts on chassis M 6 10 Nm (7 ft.lb)
M 8 25 Nm (19 ft.lb)
M 10 45 Nm (33 ft.lb)
WP 1218T712 WP 1218T714
Compression adjuster 5 6
Rebound adjuster 14 12
Spring PDS3–250 PDS2–250
Spring preload 5 mm (0.20 in) 6 mm (0.23 in)
STANDARD-ADJUSTMENT - SHOCK ABSORBER
TORQUES The clamping bolts of the fork plates must be
tightened in several (3) steps. Otherwise, the bolts
might come loose.