2004 Suzuki RM250 Workshop Manual (P/N 99000-20803)

• 229-page factory-authorized technical reference providing the definitive baseline for 2004 Suzuki RM250 engine, cooling, and fuel system maintenance.
• Official Suzuki Motor Corporation publication (P/N 99000-20803) detailing the K4 production series.
• Documents hundreds of critical engine and chassis clearances, including crankshaft runout, cylinder bore measurements, and clutch plate thickness service limits.
• Features over 75 exploded-view diagrams detailing torque values, fluid-application points, and component assembly order for the engine, transmission, and suspension.
• Explores the kick starter, magneto rotor, stator, exhaust valve, and electrical system.
• Outlines essential troubleshooting, wiring diagrams, front forks, rear suspension, wheels, and brake calipers.

Component and System Documentation

Getting inside the 2004 RM250 requires exact data. This PDF documentation delivers a structured breakdown of the entire motorcycle, starting with general machine information, serial number locations, and standard operating instructions. From there, periodic maintenance charts outline the strict intervals required for inspecting the fuel system, drive chain, and cooling components. To support precise diagnostics, the manual integrates engine coolant density-freezing point curves, carburetor tuning charts, and transmission gear schematics.

Chapters systematically break down the dismounting and mounting of the 249cc powerplant. You get the factory internal specifications for the piston, cylinder head, and clutch assembly. For the bottom end, the transmission and crankshaft sections provide clear visual mapping of gear clusters and bearing locations alongside documented service limits for wear and runout. Furthermore, it contains step-by-step instructions for complex jobs that usually require a costly dealership repair, such as safely splitting the crankcase, overhauling the front forks, and fully rebuilding the rear suspension linkage. Accessing the manufacturer's exact tolerances eliminates workbench hesitation and turns an extensive engine teardown into a predictable, profitable process.

Engine, Fuel, and Technical Specifications

Precision is everything on these two-strokes. Working on high-performance machinery carries inherent physical risks, so reviewing the exact safety procedures and specifications mapped out here is essential before picking up a wrench. Handling toxic liquids like DOT 4 brake fluid or pressurized engine coolant requires strict adherence to these factory warnings.

When dealing with the K4 RM250, experienced technicians know about specific model pitfalls. For instance, if heavy tar drips from the exhaust valve breather hose, the current two-stroke oil is likely accumulating carbon within the exhaust valve chamber, requiring an oil brand switch to prevent the assembly from binding. Additionally, during a top-end rebuild, failing to perfectly align the piston ring ends with the locating pins before inserting the piston into the cylinder will instantly damage the new rings.

The manual lists the exact setup parameters for the Keihin carburetor, including standard jetting configurations for various track conditions. Proper fuel delivery relies on a documented carburetor float height of 6.5 mm ± 1.0 mm. When buttoning up the top end, cylinder head nut torque values are specified in a strict multi-stage sequence, finishing at 25 Nm. Lower down, clutch spring bolts require 5 Nm, and the crankcase bolts take 11 Nm during assembly. Fluid capacities are clearly stated: expect to use 750 ml of transmission oil for routine changes and 1100 ml for the cooling system.