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KTM EXC User Manual

KTM EXC
153 pages
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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.

Table of Contents

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KTM EXC Specifications

General IconGeneral
IgnitionKokusan
StarterKickstarter
Transmission6-speed
Engine TypeSingle Cylinder, 2-Stroke
CoolingLiquid Cooled
LubricationPremix

Summary

Removing and Refitting Engine

Dismounting the engine

Step-by-step guide for safely removing the engine.

Refitting the engine

Instructions for reinstalling the engine.

Disassembling the Engine

Dismounting of Cylinder Head, Cylinder and Piston

Detailed steps to disassemble cylinder head, cylinder, and piston.

Parting of Engine Housing Halves

Instructions on how to separate engine housing halves.

Dismounting of the Crankshaft

Steps for removing the crankshaft from the engine.

Servicing on Individual Components

Crankshaft

Details on crankshaft servicing, measurements, and replacement.

Assembling the Engine

Assembling the Engine Housing

Steps for joining engine housing halves and sealing.

Mounting Piston and Cylinder

Guide for installing the piston and cylinder assembly.

Trouble Shooting

Trouble Shooting 250 - 380

Guide to diagnosing and resolving common engine problems.

Lubrication and Maintenance Schedule

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