1999-2006 KTM 125/200 SX, SXS, MXC, EGS, EXC, XC, XC-W Service & Repair Manual (P/N 3.206.031-E)

Original OEM publication Art. Nr. 3.206.031-E serves as the primary factory reference for the 1999–2006 production cycle of KTM's liquid-cooled, single-cylinder two-strokes. This 186-page documentation covers the 125 and 200 SX, SXS, MXC, EGS, EXC, XC, and XC-W variants.

• Features 12 highly detailed engine exploded-view diagrams for precise parts identification.
• Includes 6 electrical schematic diagrams covering multiple Kokusan ignition setups.
• Provides 14 specific torque-value tables for critical engine and chassis assembly points.

Component and System Documentation

This official workshop manual details the architecture and maintenance requirements of the specified KTM model range. The documentation is organized by major motorcycle systems, focusing heavily on the removal, installation, and inspection of the powerplant. Technicians will find complete teardown overviews for the engine housing, transmission, crankshaft, and shift mechanism. It also breaks down the clutch and fuel systems. Do you need to rebuild the hydraulic clutch or adjust the exhaust power valve? The manual provides exact factory parameters for those tasks. It even covers oil pump service for models running separate lubrication systems. For electrical diagnostics, the reference includes wiring schematics specific to Kokusan 2K-1, 2K-2, and 2K-3 configurations. Working on high-performance two-stroke engines carries inherent safety risks. Always verify your mechanical capabilities and ensure you are using appropriate workshop equipment before initiating a major teardown.

Engine and Maintenance Specifications

Accurate tolerances are the backbone of any reliable rebuild. This reference text supplies the exact measurements and torque values required for the chassis and drivetrain. You will find specific fastener limits, including the 120 Nm required for the inner clutch hub nut and the 100 Nm specification for the swingarm pivot. The documentation confirms a cooling system capacity of 1.2 liters. When measuring piston fitting clearance, the manual dictates 0.06 mm for the 125 cc engines and 0.085 mm for the 200 cc variants. Electrical testing is straightforward with detailed ignition stator measurements mapped by cable color combinations. For example, primary coil resistance values typically range from 0.425 to 0.575 ohms.