2012–2013 Yamaha YFM35FGD, YFM350FAD Grizzly 350 Owner's Manual (P/N LIT-11616-25-40)

• A 485-page PDF set in two Yamaha publications: 343-page 2012 Service Manual for YFM35FGB/YFM35FGHB, P/N LIT-11616-25-40 with Yamaha manual code 1NS-F8197-10; 142-page Owner’s Manual for YFM35FGD/YFM350FAD, publication 1NS-F8199-61-E0.
• Engine and CVT repair coverage includes compression testing, engine removal and installation, cylinder-head and valve service, piston and cylinder inspection, crankcase/crankshaft work, oil pump and starter clutch service, primary and secondary sheaves, centrifugal clutch, transmission, and middle gear setup.
• Chassis procedures address wheel hubs, front brake calipers and master cylinder, rear drum brake, handlebar and steering stem, tie-rods, steering knuckles, ball joints, front arms, shock absorbers, and swingarm service.
• Shaft-drive work covers front constant-velocity shafts, the differential and On-Command 2WD/4WD components, rear axle, final drive, and rear drive shaft with backlash measurement, shim selection, and operational checks.
• Fuel and periodic-service sections document carburetor disassembly, inspection, reassembly, and fuel-level adjustment, plus valve clearance, V-belt replacement, hydraulic brake bleeding, toe-in, drive-select linkage adjustment, lubrication, and scheduled checks.
• Electrical diagnosis and owner guidance include circuit diagrams, component tests, troubleshooting charts, the complete wiring diagram, pre-operation checks, starting and reverse operation, terrain-riding instruction, and Europe/Oceania safety and loading labels.

Exact Document Scope

This is a two-publication set, not a short owner booklet. The Service Manual is explicitly labeled for 2012, is the first edition dated August 2011, and identifies Yamaha model IDs 1NS1 and 1NS5. The May 2012 first-edition Owner’s Manual carries the European and Oceania material. Its EC declaration also names YFM350FWA (YFM35FG) and shows VIN 5Y4AH13W0C0515667–. Coverage is model-code specific, so check the frame label before selecting repair data or parts.

The owner publication documents separate regional placards along with differences in indicator labeling, tire references, curb-weight data, and fuel recommendations. Those details help identify imported machines whose controls or labels differ from North American examples.

Factory Repair Depth

The Service Manual is organized into specifications, periodic checks and adjustments, chassis, engine, fuel system, drive train, electrical system, and troubleshooting. Removal and disassembly sections begin with exploded views and job charts, then provide inspection criteria, assembly notes, torque and lubrication calls, and replacement symbols. This is actual repair coverage rather than owner-level maintenance alone.

Internal engine work reaches valve guides and seats, piston rings, the starter clutch, balancer gears and oil pump, CVT sheaves, clutch, crankcase, crankshaft, transmission, and middle gear alignment. Carburetor procedures include teardown, passage and component inspection, reassembly, installation, and fuel-level setup.

The special-tool section supplies both 90890-series and North American YM/YU numbers. Examples include valve spring compressor 90890-04019/YM-04019, sheave spring compressor 90890-04134/YM-04134, crankcase separator 90890-01135/YU-01135-B, and gear-lash measurement tool 90890-01475/YM-01475.

Drivetrain, Electrical, and Reference Data

The 4WD chapters go beyond axle replacement. They include CV-joint disassembly and inspection, differential-motor checks, differential backlash adjustment, rear final-drive teardown, bearing service, pinion and ring-gear shim selection, ring-gear-stopper clearance, rear axle inspection, and final-drive installation.

Several middle-gear and final-drive retainers use left-hand threads; treating them like standard hardware can damage the threads or housing. The manual also warns that insufficient backlash is destructive to the gear teeth, making the shim and backlash procedures critical after gearcase repair.

Named diagrams and charts include the Engine Oil Lubrication Chart, Cable Routing drawings, Ignition System Circuit Diagram, Starting Circuit System Operation, 2WD/4WD Selecting System Circuit Diagram, and the YFM35FGB/YFM35FGHB 2012 Wiring Diagram. Electrical fault finding covers ignition, starting, charging, lighting, signaling, oil-cooler fan control, and four-wheel-drive selection, with related component tests.

Reference sections provide general, engine, chassis, and electrical specifications; engine and chassis torque tables; lubrication points and lubricant types; fluid capacities; wear and clearance limits; and electrical test data.

Operation, Safety, and Owner Maintenance

The Owner’s Manual explains cold and warm starting, drive-select and reverse operation, On-Command four-wheel drive, parking, break-in, cargo, carriers, storage-compartment limits, and trailer loading. Riding instruction covers hills, crossing slopes, shallow water, rough terrain, sliding, skidding, and what to do if the ATV stalls or begins to tip.

Owner-level service includes pre-operation fluid, brake, tire, fastener, light, and switch checks; periodic maintenance charts; engine, final-drive, and differential oil service; air-filter and spark-arrester cleaning; brake adjustment; battery and fuse service; lighting work; and basic troubleshooting.

Brake, steering, engine, and shaft-drive repair can leave the ATV unsafe if model identification, bleeding, timing, backlash, or final inspection is skipped. The Owner’s Manual supports safe operation and scheduled care; the Service Manual supplies the deeper repair procedures and factory reference data for qualified mechanics and experienced DIY owners.