1987–2002 Yamaha YFS200 Blaster ATV Factory Service Manual Set (P/N 2XJ-28197-10)

The supplements update the base manual with revised specifications and procedures. Their forewords require them to be used with the earlier publications listed above, all of which are included.

PDF Search, Bookmarks, and Page Count

Finding procedures and wiring details: Text search is available in the YFS200P and YFS200R supplements. The base manual and YFS200A supplement require visual lookup. Embedded bookmarks open the publications and major sections; small wiring labels require zooming.

One printable English PDF contains 343 pages total, including 29 pages of covers and introductory material, one blank chapter-divider page, and one memo page.

Engine Overhaul, Chassis Repair, and Electrical Testing

These highlights are a selection of the documented work. Other topics include speed-limiter adjustment and headlight bulb replacement.

• Engine repair: Engine removal, cylinder and piston inspection, crankcase separation, crankshaft checks, and reassembly procedures with exploded views.

• Clutch and transmission: Clutch inspection and adjustment, gearbox disassembly, shift-fork and shift-cam checks, balancer installation, and kickstarter service.

• Carburetor and Autolube: Carburetor rebuilding, float and fuel-level checks, reed-valve inspection, pump-output checks, and oil-system bleeding.

• Brake service: Front drum and mechanical rear-disc procedures in the base manual, plus hydraulic brake repair in the YFS200R supplement.

• Steering and suspension: Steering-knuckle and tie-rod inspection, front-arm service, wheel-bearing replacement, rear-axle work, and swingarm clearance adjustment.

• Electrical diagnosis: Ignition, lighting, and signal-system test charts, switch-continuity checks, component resistance specifications, cable-routing drawings, and model-specific wiring diagrams.

Yamaha wrote these publications primarily for its dealers and qualified mechanics, assuming an existing understanding of mechanical repair concepts and procedures.

Engine and Drivetrain Repair

The base manual organizes the machine’s mechanical and electrical systems across eight core chapters. It provides step-by-step procedures for top-end work, crankcase splitting, crankshaft installation, and internal transmission inspection.

Exploded views identify component order, lubrication points, replacement parts, and tightening specifications. The crankshaft, piston, and balancer illustration supports assembly checks alongside the inspection limits and component-specific torque tables.

Special-tool references include the crankcase separating tool, P/N YU-01135 / 90890-01135, and crankshaft installation equipment. The drivetrain sections also cover clutch-release adjustment, gear engagement, shift-fork orientation, and drive-sprocket holder fasteners.

Carburetor, Reed Valve, and Oil Injection

The Mikuni VM26SS section includes a sectional view showing the fuel, air, and mixture passages. Inspection instructions cover the needle valve, valve seat, jets, throttle valve, float, and reed petals, with reed thickness and stopper specifications.

Cold-weather carburetor setting charts distinguish the base and updated jetting. Autolube documentation covers delivery-line inspection, pump-output assessment, and air bleeding after oil-system disconnection or an empty oil tank.

Brake Variants, Steering, and Suspension

Brake configuration matters: The base manual covers front drum brakes and a cable-operated rear disc. The YFS200R supplement documents dual hydraulic front discs and a hydraulic rear disc, including caliper and master-cylinder disassembly, inspection, assembly, and bleeding.

The hydraulic brake chapter warns that solvents can swell and distort internal seals. Rear-axle instructions separately identify thread and spline damage caused by hammering directly on the axle end.

Steering and suspension coverage includes tie-rod positioning, steering-column bearings, front-arm bushings, and swingarm shim selection. These drawings and inspection procedures let you check assembly relationships and wear before reassembly.

Have a qualified technician oversee or perform brake service and work involving the pressurized rear shock. The manual cautions against opening the shock’s cylinder assembly.

Ignition and Lighting Fault Isolation

Ignition troubleshooting distinguishes spark-plug, coil, switch, stator, and wiring faults. The throttle and carburetor switch checks provide a documented way to investigate the ignition-control circuit before replacing components.

The YFS200R supplement adds parking-brake switch checks and explains the associated engine-speed restriction. Ignition and lighting circuit diagrams, cable-routing drawings, and separate YFS200U, YFS200P, and YFS200R wiring diagrams support tracing the appropriate configuration.

A Preview of Engine Fits, Torque, and Oil Data

For the YFS200U, the base manual specifies piston-to-cylinder clearance of 0.035–0.040 mm and a crankshaft runout limit of 0.03 mm. These values accompany the engine inspection procedures.

Its tightening table lists 27 Nm for the cylinder-head fasteners. Transmission lubrication data distinguishes a 0.65 L periodic oil change from the separate total-fill specification, so the listed quantity stays tied to the service being performed.