2004 Suzuki RM250 Owner's Service Manual (P/N 99011-37F53-01A)

Suzuki’s Owner’s Service Manual for the 2004 RM250, K4 edition (P/N 99011-37F53-01A) combines operating instructions and race maintenance with engine and chassis repair procedures.

• Engine repair: Engine removal and installation, cylinder-head and piston inspection, crankcase separation, and crankshaft, connecting-rod, bearing, and oil-seal service.

• Clutch and transmission: Clutch-plate inspection, release-mechanism service, kick-starter repair, gearbox disassembly, and gearshift-component inspection and reassembly.

• Fuel and exhaust control: Keihin carburetor tuning and overhaul, power-jet solenoid testing, throttle-position sensor inspection, reed-valve service, and exhaust-valve governor repair.

• Cooling system: Cooling-circuit and radiator-cap pressure tests, radiator inspection, and water-pump disassembly, bearing replacement, seal inspection, and reassembly.

• Suspension and steering: Front-fork service and tuning, steering-bearing replacement, rear-shock oil replacement, and swingarm and suspension-linkage overhaul.

• Brakes and wheels: Caliper and master-cylinder overhaul, brake bleeding, pad replacement, disc inspection, and front and rear wheel-bearing replacement.

• Electrical diagnosis: Ignition peak-voltage measurements, ignition-coil and stator resistance tests, CDI test tables, and wiring diagrams with wire-color codes.

The maintenance and tuning material suits mechanically experienced RM250 owners; internal engine and shock work calls for the specified measuring tools and service equipment.

Engine and Drivetrain Repair

The engine chapters document piston and cylinder inspection, clutch wear checks, crankshaft runout, and connecting-rod measurements. Transmission assembly views show gear placement and bearing locations, with inspection criteria for shift forks, gear grooves, and engagement claws.

Crankcase separation and crankshaft installation are covered with the relevant special tools, including separator 09920-13120 and crankshaft installer 09910-32812. Exploded views identify tightening torques, lubrication points, and locking-agent locations.

Piston-installation cautions explain how incorrectly positioned ring ends can damage the rings. Clutch illustrations distinguish the drive-plate types and their assembly positions.

Carburetor Tuning and Ignition Diagnosis

The Keihin section explains the slow, intermediate, main, and power-jet systems. A throttle-opening tuning chart connects each metering component to its operating range, while temperature and altitude graphs explain changes in carburetor requirements.

The troubleshooting tables distinguish poor low-speed running from high-speed power loss, helping narrow checks to components such as the throttle-position sensor, power-jet solenoid, ignition system, and exhaust valve.

The Electrical Circuit and Wiring Diagram show the connections between these controls, the magneto, CDI unit, ignition coil, and engine-stop switch. Exhaust-valve coverage extends to the governor and actuator; maintenance notes also discuss tar draining from the breather hose in relation to two-stroke oil choice.

Cooling and Race Maintenance

Periodic maintenance charts are organized around races and operating hours, with separate inspections before practice and competition. General information includes operating instructions and frame and engine number locations.

The cooling chapter combines leak testing with radiator-cap checks and water-pump service. An engine coolant density–freezing point curve supports the coolant recommendations.

Suspension, Brakes, and Chassis Service

Fork tuning charts relate handling symptoms to damping, spring, and oil-quantity adjustments. Fork service covers seals and bushings, but the manual instructs against internal disassembly of the damper rod assembly and compression damper unit.

Rear-suspension coverage includes shock oil replacement, nitrogen charging, and linkage-bearing installation. Incorrectly oriented linkage bolts can obstruct movement and damage the linkage.

Brake chapters cover both hydraulic circuits through caliper and master-cylinder inspection and reassembly. Wire, cable, and hose routing drawings support installation checks, while muffler set-up drawings distinguish the U.S. configuration from the Canadian and Japanese versions.

Follow the manual’s safety precautions for high-pressure shock service, brake fluid, and hot coolant.

A Preview of Carburetor and Engine Assembly Data

These examples represent a small selection of the manual’s adjustment and assembly specifications.

The carburetor inspection section specifies a standard float height of 6.5 ± 1.0 mm, measured with the float tip just contacting the float valve.

Engine assembly data distinguish an initial cylinder-head nut torque of 15 N·m from a final torque of 25 N·m, with a specified tightening pattern. Separate values include 5 N·m for the clutch spring bolts and 11 N·m for the crankcase bolts.

PDF Reading, Navigation, and Page Count

Text search and diagram detail: PDF text search and embedded bookmarks are not available. The checked electrical diagrams are readable, with zoom helpful for the smallest wire codes. Visible SAMPLE watermarks appear on the pages.

Supplied as one printable, 229-page PDF in English: 223 chapter pages, four introductory pages, and two covers, all included in the total.