2007–2009 Honda CRF150R / CRF150RB Service Manual (P/N 61CS400, OEM)

• Covers 2007–2009 Honda CRF150R and CRF150RB motocross motorcycles, including standard and big-wheel chassis configurations
• Official OEM publication P/N 61CS400, documenting factory maintenance, repair, and assembly specifications
• Contains 46 detailed torque-value tables, 14 specialized electrical system reference charts, and 23 exploded-view system assembly illustrations
• Comprehensive 328-page factory publication providing the exact service data and system schematics required for engine and chassis maintenance cycles
• Features a digital PDF format, complete wiring diagrams, and detailed troubleshooting guides
• Details essential assemblies like the multi-plate clutch, kickstarter, crankcase, transmission, steering stem, and hydraulic brakes

Procedural and Diagnostic Content

The documentation details the internal workings of the liquid-cooled Unicam engine and Pro-Link suspension architecture. Chapters are organized logically by system. They move from general vehicle information and fuel system calibration directly to bottom-end assembly and transmission rebuilding. Step-by-step instructions allow mechanics and DIYers to bypass expensive dealership labor for complex tasks, such as replacing telescopic fork seals, adjusting valve clearance shims, and completely overhauling the shock absorber. Each section provides detailed system-level illustrations to identify internal components rapidly. Visual diagnostics are heavily supported by cable and harness routing drawings, a lubrication system diagram, coolant gravity charts, and cooling system flow patterns. Properly referencing these specifications prior to any repair ensures workshop safety and maintains the structural integrity of the motorcycle. For instance, working with highly pressurized components like the nitrogen-filled rear shock poses severe physical risks without strict adherence to factory depressurization sequences. Furthermore, the text outlines carburetor jetting strategies for varying altitudes and temperatures, highlighting needle clip positions and pilot screw adjustments via precise tuning information charts. Having these factory tolerances accessible directly at the workbench streamlines complex teardowns and maximizes diagnostic accuracy.

Technical Data Preview

Precise engine and chassis specifications are documented to help maintain peak performance for both models. Inside the cylinder head specification table, intake valve clearance is listed at 0.16 ± 0.03 mm. Technicians will find critical engine assembly data, such as the 31 Nm torque requirement for the cylinder head nut. Cooling system capacity is noted at exactly 0.76 liters. Electrical reference values cover the ignition pulse generator, exciter coil, and throttle position sensor. When servicing these specific Honda mini-motos, mechanics must navigate unique engineering designs. For example, the water pump impeller utilizes left-hand threads—a trap that frequently leads to stripped shafts if turned conventionally. A backwards oil filter installation is another critical oversight that instantly starves the top-end of lubrication, resulting in catastrophic camshaft damage. For convenience on the bench, torque tables list both Nm and ft-lbs across all major fasteners. This includes heavy-duty components like the 88 Nm rear axle nut and the 64 Nm flywheel nut.