2000-2006 KTM 250 EXC, 400/450/520/525/540/560/610 Racing Engines Repair Manual (P/N 3.206.033-E)
222 Pages • 12.22 MB • Instant, Printable PDF
KTM Models Covered & Key Technical Specifications
Models: 250 EXC, 400 SX, 400 MXC, 400 XC, 400 EXC, 400 SMR, 400 SXS, 450 SX, 450 MXC, 450 XC, 450 EXC, 450 SMR, 450 SXS, 520 SX, 520 MXC, 520 XC, 520 EXC, 520 SMR, 525 SX, 525 MXC, 525 XC, 525 EXC, 525 SMR, 540 SXS, 560 SMR, 610 CRATE
Sub-models / Variants: Racing, 4-speed, 6-speed
Model Years: 2000–2006
Serial Numbers: Engine numbers start with digit matching model year (e.g., '0' for 2000, '6' for 2006)
Technical Data:
- Engine oil capacity: 1.25 liters
- Engine oil type: Fully synthetic Motorex Power Synt 4T 10W/50 or 5W/40
- Transmission type: 6-speed claw shifted
- Clutch type: Multi-disc in oil bath
- Cooling system: Liquid-cooled
- Valve clearance: 0.12 mm
- Crankshaft run out: Max 0.12 mm
KTM Manual Features & Content Preview
- Covers the 2000–2006 KTM 250 EXC, 400/450/520/525/540/560/610 Racing engines, including all sub-model variants and crate configurations
- Official 222-page OEM publication (Art.-Nr. 3.206.033-E, Edition 02/2006)
- Features 120 exploded-view component diagrams and 15 torque-specification tables for complete engine repair and assembly
- This 2006 final update consolidates all previous annual engine revisions, serving as the definitive technical reference for the 250–610 series
Engine Documentation and Assembly
This KTM publication details the complete teardown and rebuild process for the 250–610 series racing powerplants. The text outlines everything from pulling the engine out of the frame to stripping the clutch and ignition systems. Mechanics will find clear guidance on assessing wear limits for pistons, cylinder coatings, and transmission gears. It also breaks down specialized procedures for managing the oil circuit and lubrication systems. The focus remains strictly on verifying critical clearances and component tolerances, detailing exact crankshaft and rocker arm setup requirements to ensure peak performance.
Technical Specifications and Maintenance Data
Beyond visual tear-downs, this technical resource documents the critical reference values necessary for routine service and deep engine repair. Engine oil capacity is specified at 1.25 liters, highlighting the requirement for fully synthetic Motorex Power Synt 4T fluids. You will find tightening torque values for every major casing bolt and internal fixture, including the vital 150 Nm setting for primary gear nuts. Valve clearances for the 450/525 models are documented at exactly 0.12 mm. The manual also lists electrical baseline data, featuring testing protocols for the CDI unit, stator, and starter relay alongside resistance values for the ignition coil circuits. Keep in mind that working on high-performance racing engines carries inherent safety risks. Always rely on certified mechanics or professional oversight before attempting major technical work on this equipment.
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