Model:
125 / 200 (MX and SX off-road models)
Model Variant:
Two-stroke motocross engine platforms, 125cc and 200cc displacements
Production Years Covered:
1998 - 2002
Model Type:
Lightweight performance off-road motorcycle
Target Audience:
Owners, independent repair shops, and enthusiasts maintaining performance-oriented off-road machines
Design Intent:
Agility and power within the lightweight displacement class, built on strong off-road racing heritage
Competitive Advantage:
Race-proven two-stroke engines with minimal weight and straightforward servicing
Maintenance Access:
Simple two-stroke architecture makes engine removal, disassembly, and top-end service practical for DIY owners
Engine Removal and Installation:
Step-by-step removal and refitting procedures
Disassembly and Reassembly:
Complete teardown and rebuild sequences
Cylinder Service:
Cylinder honing procedures
Piston and Rings:
Piston and ring replacement procedures
Crankshaft:
Bottom-end inspection and servicing
Torque Values:
Comprehensive torque specifications and diagrams
Lubrication System:
In-depth lubrication system guidance
Fuel System:
Fuel system specifics including carburetor servicing
Ignition:
Coverage of engine-related ignition components
Cooling:
Engine cooling system service information
Troubleshooting:
Diagnostic procedures for common engine problems
Clutch:
Clutch servicing procedures
Transmission (Engine):
Internal gearbox service as covered in the engine repair scope
Specifications and Maintenance
Technical Specifications:
Comprehensive factory specifications for engine components
Diagrams:
Exploded views and technical diagrams
Periodic Maintenance:
Detailed periodic maintenance schedules
Fluid Specifications:
Recommended fluids, capacities, and specifications
Supplement Consolidation:
Information from various supplements covering incremental model year changes 1998-2002
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
Engine Type:
Two-stroke single-cylinder liquid-cooled
Displacement Options:
125cc and 200cc
Fuel System:
Carbureted (Keihin-type carburetor)
Lubrication:
Premix two-stroke lubrication
Power Character:
High-revving, race-oriented two-stroke power delivery
Exact Output Figures:
N/A - not specified in the source description
Chassis Type:
Lightweight off-road motocross motorcycle
Wheelbase:
N/A - not specified for this model
Overall Length:
N/A - not specified for this model
Curb Weight:
N/A - not specified for this model
Design Priority:
Minimal weight for agility in the displacement class
Periodic Maintenance:
Detailed periodic maintenance schedules included in the manual
Top-End Service:
Piston and ring replacement intervals per two-stroke racing use
Cylinder Service:
Cylinder honing procedures for wear restoration
Fluid Specifications:
Factory-recommended fluids and capacities detailed in the manual
Common Wear Items:
Pistons, rings, clutch plates, and reed components subject to racing wear
Troubleshooting:
Diagnostic procedures for common engine problems
Manufacturer:
KTM, Austrian manufacturer with strong off-road racing heritage
Model Evolution:
Two-stroke motocross platform continuously updated through 1998-2002, with incremental model year changes documented via factory supplements
Production Location:
Austria (KTM factory production)
