This manual covers the Bruin YFM350 and Grizzly YFM35 2WD All-Terrain Vehicles. The Bruin, produced from 2003-2006, and the Grizzly, from 2007-2011, represent a commitment to reliable and capable off-road vehicles. These ATVs, powered by a 348cc air-cooled, 4-stroke engine, are designed for a variety of terrains and uses, reflecting a long-standing reputation for engineering quality and durability in the ATV market.
This comprehensive service manual provides detailed information for the maintenance, repair, and troubleshooting of your ATV. It covers all aspects of the vehicle, including the engine, fuel system, cooling system, transmission, brakes, suspension, steering, frame, and electrical systems. With clear instructions, diagrams, and illustrations, this manual is an essential resource for DIY mechanics and owners looking to maintain their vehicles effectively and ensure optimal performance and longevity.
Model:
Bruin YFM350 / Grizzly YFM35
Manual Part Number:
LIT-11616-BN-20
Model Generation Bruin:
YFM350 Bruin series production spanned several years before being integrated or succeeded by other lines.
Model Generation Grizzly:
Grizzly line evolved significantly, with the YFM35 designation covering the earlier 350cc models of this generation.
Target Audience:
DIY mechanics, ATV owners seeking to perform maintenance and repairs, saving on dealer labor costs.
Value Proposition:
Provides extensive repair information at a fraction of dealer service costs. Enables owners to maintain their ATVs effectively.
Benefits:
Cost savings on labor, empowerment for self-maintenance, comprehensive repair guidance, instant access to technical data.
Applicable Years:
2003, 2004, 2005, 2006 (Bruin YFM350); 2007, 2008, 2009, 2010, 2011 (Grizzly YFM35)
Coverage Areas:
All repair topics including general information, periodic maintenance, fuel system, cooling system, engine top end, engine lubrication system, engine removal/installation, crankshaft/crankcase, transmission, wheels/tires, final drive, brakes, suspension, steering, frame, electrical system, diagnostics.
Bruin Specific Pages Start:
367
Manual Type:
Complete Service Manual / Repair Manual
Supplement Note:
The 350 Bruin models are presented as a supplement to a base manual for the 450 model, indicating shared chassis and some systems but specific engine/drivetrain details for the 350.
Systems Covered:
Engine (Top End, Lubrication, Removal/Installation, Crankshaft/Crankcase), Fuel System, Cooling System, Transmission, Final Drive, Brakes, Suspension, Steering, Frame, Electrical System.
Procedures Included:
Periodic Maintenance, Troubleshooting, Diagnostics, Repair, Overhaul, Component Replacement, System Adjustments.
Technical Depth:
Comprehensive, from basic maintenance to detailed engine and transmission rebuilds, including diagnostic procedures and component-level repair instructions.
Visual Aids:
Detailed diagrams, illustrations, photographs, and exploded views.
Diagnostic Procedures:
Detailed troubleshooting charts and diagnostic procedures for common problems within each system.
Special Tool Requirements:
Manual may list specific Yamaha special tools required for certain repair procedures.
Print Quality:
High-resolution, suitable for printing all pages.
Searchability:
Likely text-searchable PDF (standard for modern manuals).
Binding Type:
N/A (Digital PDF Download)
Paper Type:
N/A (Digital PDF Download)
Operating Systems:
Compatible with all versions of Windows & Mac.
Software Requirements:
Adobe PDF Reader.
Download Speed:
Instant Download (No Waiting).
Illustrations Quality:
High-quality, clear illustrations and diagrams that aid in understanding complex procedures.
Engine Type Bruin:
Air-cooled, 4-stroke, SOHC, 2-valve
Engine Displacement Bruin:
348cc
Engine Type Grizzly:
Air-cooled, 4-stroke, SOHC, 2-valve
Engine Displacement Grizzly:
348cc (YFM35 designation likely refers to the 350cc class, not an exact 35cc displacement)
Cooling System:
Air-cooled
Compression Ratio:
Refer to manual for specific compression ratio figures for these engine variants.
Fuel Delivery:
Carburetor (specific model/size detailed in manual)
Lubrication System:
Wet Sump (details on oil type and capacity in manual)
Bore Stroke:
Specific bore and stroke measurements for the 348cc engine are detailed in the manual.
Transmission Type:
Automatic (likely Ultramatic or similar Yamaha CVT system for these models)
Transmission Features:
Continuously Variable Transmission (CVT) with engine braking. Details on belt inspection/replacement, fluid type and changes are critical.
Gear Ratios:
Manual provides detailed gear ratios for the transmission and final drive, crucial for performance and maintenance.
Body Style:
All-Terrain Vehicle (ATV)
Dry Weight Approx Bruin:
Refer to manual for exact figures (typically around 500-550 lbs)
Dry Weight Approx Grizzly:
Refer to manual for exact figures (typically around 570-610 lbs)
Wheel Size:
Refer to manual for specific front and rear wheel sizes (typically 12-inch).
Tire Size:
Refer to manual for specific front and rear tire size recommendations and specifications.
Safety Standards:
Adherence to relevant ATV safety standards (details and precautions in manual).
Braking System:
Hydraulic disc brakes (front and rear). Manual covers brake system maintenance, bleeding, pad replacement.
Throttle Limiter:
Likely adjustable or programmable throttle limiter for certain models/conditions (covered in manual).
Display Features:
Basic LCD instrument panel displaying speed, odometer, trip meter, fuel level, 4WD indicator (if equipped), and warning lights. Detailed diagnostics available in manual.
Engine Braking:
CVT system provides engine braking for downhill control, a key feature for ATVs.
Diagnostic Tools:
Manual facilitates diagnostics through visual inspection, measurement, and adherence to specified procedures, rather than electronic OBD-II type systems.
Oil Change Interval:
Refer to manual for specific intervals (typically every 1000 km or 6 months for engine oil).
Air Filter Maintenance:
Regular inspection and cleaning/replacement based on usage conditions (detailed in manual).
Spark Plug Replacement:
Refer to manual for recommended intervals and correct spark plug type (e.g., NGK).
Engine Oil Type:
Yamalube 4-stroke motorcycle oil (specific viscosity, e.g., 10W-40 or 20W-50, and API classification listed in manual).
Coolant Type:
Permanent type antifreeze coolant (specified in manual).
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid (specified in manual).
Gear Oil Type:
Yamaha Hypoid Gear Oil or equivalent (specified for final drive and transmission if separate).
Common Wear Items:
Brake pads, wheel bearings, drive belts (CVT), suspension bushings, steering components are common wear items. Manual provides inspection procedures.
Carburetor Issues:
Carburetor clogging due to fuel varnish, especially after storage, is a common issue. Manual details cleaning and adjustment.
Torque References:
Manual provides detailed torque specifications for critical fasteners, including engine, suspension, and wheel components.
Engine Oil Capacity:
Refer to manual for exact engine oil capacity with and without filter change.
Coolant Capacity:
Refer to manual for exact coolant system capacity.
Yamaha Atv Legacy:
Yamaha has a long-standing reputation for producing reliable and capable ATVs, pioneering many features in the industry.
Bruin Grizzly Relation:
The Bruin (YFM350) often served as a precursor or parallel model to the Grizzly lineup, sharing many mechanical components and design philosophies. The Grizzly is typically positioned as a more premium or specialized model within Yamaha's ATV range.
Manufacturing Region:
Yamaha ATVs are typically manufactured in Japan or at Yamaha's global production facilities.
Yamaha Atv Awards:
While specific awards for these exact older models might be scarce, Yamaha ATVs, including the Bruin and Grizzly lines, have consistently been recognized for reliability, performance, and value within the ATV market.
