Target Audience:
Yamaha ATV Owners, Service Technicians, DIY Enthusiasts
Value Proposition:
Complete Set for Basic to Advanced Service Work, Unmatched Detail and Coverage
Manual Uniqueness:
Includes Owner's Manual and Multiple Service Supplements for Full Model Year Coverage
Engine:
Complete Engine Overhaul, Carburetor, Cooling System, Lubrication System, Ignition System, Starting System, Fuel System
Transmission:
Automatic Transmission (CVT), Drive System, Final Drive
Drivetrain:
Shaft Drive System, CV Joints, Differential
Suspension:
Front Suspension (A-arms, shocks, springs), Rear Suspension (Swingarm, shock, spring)
Brakes:
Front and Rear Brake System (Hydraulic Disc Brakes), Master Cylinders, Calipers, Lines, Pads
Electrical:
Wiring Diagrams, Lighting System, Battery, Charging System (Stator, Regulator/Rectifier), CDI Unit, Ignition Switch, Fuses
Bodywork:
Chassis, Body Panels, Fenders, Seat, Handlebars, Front Rack, Rear Rack
Controls:
Throttle Control, Brake Levers, Gear Selector, Parking Brake
Maintenance:
Routine Inspections, Oil Changes, Filter Replacements, Spark Plug Service, Chain/Drive Adjustments (if applicable), Brake Pad Checks
Troubleshooting:
Systematic Diagnostic Procedures for Engine, Electrical, and Mechanical Issues
Repair:
Step-by-Step Disassembly and Reassembly Instructions for all Major Components and Systems
Rebuild:
Complete Engine Rebuild Procedures, Transmission Overhaul
Adjustment:
Carburetor Adjustment, Valve Clearance Adjustment, Brake Adjustment
Diagnostics:
Component Testing, Fault Code Interpretation (if applicable)
Depth Level:
Expert-Level Technical Detail for Professional Technicians and Experienced DIYers
Information Type:
Detailed Pictures, Diagrams, Torque Specifications, Clear Step-by-Step Instructions
Engine Type:
Four-Stroke, SOHC, Air-Cooled
Displacement:
230 cc (approx.)
Bore X Stroke:
Refer to Service Manual for Exact Specifications
Compression Ratio:
Refer to Service Manual for Exact Specifications
Horsepower:
Refer to Service Manual for Exact Specifications
Torque:
Refer to Service Manual for Exact Specifications
Fuel Delivery:
Carburetor (Mikuni VM series likely)
Fuel Type:
Unleaded Gasoline
Oil Type:
Yamaha's Recommended Yamalube or Equivalent (API SG or higher, SAE 10W-30 or 20W-40)
Oil Capacity:
Refer to Service Manual or Owner's Manual (typically around 1.5 - 2.0 liters with filter change)
Length:
Refer to Service Manual for Exact Specifications
Width:
Refer to Service Manual for Exact Specifications
Height:
Refer to Service Manual for Exact Specifications
Dry Weight:
Approx. 234 kg (516 lbs)
Curb Weight:
Refer to Service Manual for Exact Specifications
Towing Capacity:
Refer to Service Manual for Exact Specifications (typically limited for ATVs)
Safety Features:
Rollover Protection (frame), Throttle Limiter (owner's manual adjustable), Parking Brake, Integrated Lighting System
Active Safety:
Disc Brakes for responsive stopping power
Passive Safety:
Durable Frame Construction, Hand Guards (standard on some models)
Engine Oil Change:
Every 1000 km or 6 months, whichever comes first (Refer to Owner's Manual for precise interval)
Air Filter Cleaning:
Regularly, or every 6 months (depending on usage conditions)
Spark Plug Replacement:
Refer to Service Manual or Owner's Manual (typically every 3000-5000 km or as needed)
Valve Adjustment:
Refer to Service Manual (typically at higher mileage intervals, e.g., 10,000 km)
Engine Oil Specification:
Yamalube API SG 10W-30 or 20W-40 or equivalent
Brake Fluid Specification:
DOT 3 or DOT 4 Hydraulic Brake Fluid
Common Wear Items:
Brake Pads, Tires, Drive Belts (CVT), Battery, Spark Plugs
Potential Failures:
Carburetor issues due to fuel varnish if not stored properly, occasional regulator/rectifier failure (common to many powersports vehicles)
Brand History:
Yamaha Motor Corporation, founded in 1955, has a long-standing reputation for producing high-quality, reliable, and performance-oriented powersports vehicles, including a strong presence in the ATV market since the 1980s.
Model Lineage:
The Bruin 250 was a popular mid-size utility ATV offering from Yamaha, positioned between smaller recreational models and larger utility vehicles, emphasizing ease of use and dependable performance.
Manufacturing Location:
Primarily manufactured in Japan and/or USA by Yamaha