KTM 250 SX-F, EXC-F, XC-F, XCF-W & SXS-F Repair Manual 2005–2010 (P/N 3.206.063-E)

This KTM repair manual covers the 250 SX-F, EXC-F, EXC-F Six Days, XC-F, XCF-W and SXS-F, with model-specific specifications across 2005–2010. P/N 3.206.063-E, edition June 2009, combines the base repair instructions with updated reference sections.

PDF Search, Bookmarks and Diagram Detail

Text access and wiring detail: The PDF is partially searchable and has embedded bookmarks for chapters and model-specific sections. Several later specification tables, maintenance schedules and wiring pages are not text-searchable. Small wiring labels require zooming; the later diagrams have softer detail than the earlier drawings.

One printable 189-page PDF, including 14 pages of covers, introductory material and front-matter blanks, plus 14 blank separator pages elsewhere in the manual.

Engine Rebuilds, Carburetor Service and Ignition Diagnosis

These selected contents show the main workshop coverage. Other topics include throttle-cable adjustment and kickstarter inspection.

• Engine overhaul: Step-by-step procedures for engine removal, crankcase separation, crankshaft inspection, piston replacement and cylinder-head disassembly and reassembly.

• Valve train: Camshaft installation, valve-clearance adjustment with shims, automatic decompressor checks and hydraulic timing-chain tensioner preparation and installation.

• Transmission and clutch: Mainshaft and countershaft assembly, shift-fork and drum inspection, clutch wear checks and hydraulic clutch bleeding.

• Carburetor service: Removal, disassembly and reassembly, accelerator-pump inspection, float-height checks, idle adjustment and throttle-position sensor testing and adjustment.

• Electrical diagnosis: Ignition-coil and stator tests, peak-voltage measurements, starter and relay checks, charging tests and model-specific wiring diagrams.

• Maintenance references: Model-specific service schedules, assembly clearances, wear limits, engine and chassis torque tables, and WP suspension settings.

KTM wrote the repair instructions for qualified, professionally trained mechanics; general workshop methods and basic workshop safety rules are assumed knowledge.

Cylinder Head, Crankshaft and Lubrication

Factory inspection limits and assembly sequences support checking engine components before reassembly. The oil-circuit schematic traces lubrication through the pressure and suction pumps, crankshaft and cylinder head, helping relate wear checks to the relevant oil passages.

Cylinder-head work: The manual specifies valve-guide gauge 770.29.026.000 and refers guide replacement and reaming to a specialist workshop. Camshaft-bearing replacement extends the coverage beyond valve adjustment.

The timing-chain tensioner instructions explain how incorrect preparation or release can let the chain skip and damage the engine. The crankshaft-bearing section warns that clamping the journal and striking the bearing ring can squeeze the crankshaft webs together and ruin the crankshaft.

Transmission and Hydraulic Clutch

Shift-mechanism exploded views and shaft-assembly illustrations identify gear orientation, thrust washers and circlips. The assembly instructions also cover shift-fork positioning and checking gear selection before completing the engine build.

Fluid specifications differ between the early clutch-bleeding instructions and later model tables, so the applicable model specification matters.

Carburetor Inspection and Adjustment

The Keihin FCR-MX 39 exploded view supports identification of jets, float components and accelerator-pump parts during service. Separate checks address the choke, hot-start slide and throttle slide. Model-specific jetting tables distinguish regional carburetor settings rather than treating every version alike.

Electrical Tests and Wiring References

Peak-voltage tables specify test conditions and connector states for adapter 584.29.042.000. These tests supplement resistance checks when tracing weak spark or generator-output faults. The CDI unit itself requires an ignition test bench.

Wiring diagrams distinguish SX-F ignition circuits from the starter, lighting and charging circuits of the enduro variants. Later diagrams include component legends and cable-color keys. The EXC-F electrical section also explains performance and soft ignition-curve selection.

Chassis Settings and Maintenance Scope

Chassis coverage provides suspension setup data, fastener torques and scheduled inspections; it does not include internal fork or shock overhaul procedures. Separate maintenance schedules distinguish competition and hobby use where applicable.

Working with high-pressure fluids and heavy components carries inherent physical risks. Always adhere to standard workshop safety protocols when applying these factory specifications.

Preview of Engine Clearances and Wear Limits

The early engine tables specify cold intake valve clearance of 0.10–0.20 mm; the 2008–2010 tables specify 0.10–0.15 mm. These model-specific differences matter when selecting the applicable adjustment data.

The component-inspection section lists maximum crankshaft journal runout of 0.15 mm and Size I piston mounting clearance of 0.030–0.052 mm.

Oil-pump inspection distinguishes two clearances: outer rotor to housing and outer rotor to inner rotor, each with a maximum of 0.20 mm. These are separate wear checks, rather than a general oil-pump clearance.