2005-2010 KTM 250 SX-F, EXC-F, XC-F, SXS-F Factory Service Manual (P/N 3.206.063-E)

Inside the 2005–2010 KTM 250 SX-F, EXC-F, XC-F, SXS-F Service Manual

• Details 2005–2010 KTM 250 SX-F, EXC-F, XCF-W, XC-F, and SXS-F 4-stroke variants
• Official KTM publication P/N 3.206.063-E (updated June 2009)
• Includes 47 detailed exploded-view diagrams and 18 torque specification tables
• Integrates factory service updates spanning early carburetor setups to later performance and electrical refinements

Mechanical Scope and Documentation

This service manual delivers assembly documentation and technical data for the KTM 250 4-stroke engine series. Sections outline engine removal and installation, component disassembly, and specific servicing requirements for the Keihin FCR-MX 39 carburetor.

The manual also maps the electrical infrastructure, detailing the CDI unit, pulse generator, and stator diagnostic values. For complex engine rebuilds and routine maintenance, mechanics can reference detailed OEM procedures for timing chain tensioner adjustments, automatic decompression weight checks, and transmission shaft assembly.

Specification Highlights

Engine data highlights include a crankshaft runout limit of 0.15 mm and a primary gear tightening torque of 150 Nm. Valve clearances are specified at 0.10–0.20 mm (intake) and 0.12–0.22 mm (exhaust), with shim thicknesses documented from 1.72 to 2.60 mm. The guide outlines oil circuit pressures and fluid capacities, noting the 1.1-liter engine oil requirement for optimal crankcase and transmission lubrication, alongside a strict cylinder wear limit of 0.070 mm for Nikasil-coated bores.

Working on high-performance motorcycle engines requires precision. While this official 781-page KTM manual provides comprehensive factory specifications for the four-stroke lineup, always ensure you have the proper tools and mechanical background, or consult a certified technician before performing heavy engine service.