🏷️ Basic Information

Make:

Yamaha

Model:

BR250

Model Code:

BR250F

Year:

1982

Generation Designation:

First Generation

Chassis Code:

BR250F

👋 Introduction

Market Position:

A specialized service manual catering to owners and mechanics of the 1982 Yamaha BR250 BR250F, a niche but enthusiast-driven classic motorcycle.

Competitive Analysis:

This manual offers an essential resource for maintaining and repairing a specific model from a reputable Japanese manufacturer known for its engineering. Compared to generic repair guides, this is a factory-level document providing precise information.

Key Features:

Detailed step-by-step instructions, clear photographic illustrations or diagrams, comprehensive troubleshooting charts, complete wiring schematics, and essential technical specifications for DIY or professional repair.

📋 Manual Details

Coverage Areas:

Full Service Repair, Maintenance, Rebuild, Refurbish, Restoration

Page Count:

Estimated 400-600 pages (typical for comprehensive service manuals)

Manual Type:

Full Service Repair Manual

Language:

English

Format:

PDF Download

📖 Manual Coverage

Systems Covered:

Engine Mechanical, Engine Electrical (Ignition, Starting, Charging), Fuel System, Carburetion, Exhaust System, Transmission, Clutch, Drivetrain, Suspension (Front & Rear), Steering System, Braking System (Front & Rear), Electrical System (Lighting, Instrumentation, Wiring), Frame, Bodywork, Cooling System (if applicable), Lubrication System

Electrical System Details:

Full wiring diagrams, lighting circuit troubleshooting, charging system diagnosis (alternator, regulator/rectifier), ignition system components (CDI, coils, spark plugs), starter motor and solenoid.

Procedures Included:

Routine Maintenance, Scheduled Servicing, Troubleshooting Guides, Diagnostic Procedures, Component Removal & Installation, Disassembly & Reassembly, Overhaul & Rebuild Procedures, Wiring Diagrams, Torque Specifications, Adjustments, Specifications & Measurements

Engine Rebuild Procedures:

Complete engine tear-down and reassembly, piston and ring replacement, cylinder honing or boring, crankshaft and connecting rod inspection, valve seat grinding and sealing, camshaft and timing chain replacement.

Chassis And Suspension Procedures:

Front fork overhaul (seal replacement, oil change), rear shock absorber inspection and replacement, steering head bearing service, wheel bearing inspection, swingarm bushing inspection and replacement.

Technical Depth:

Comprehensive (from basic maintenance to complete engine rebuilds and chassis overhauls)

Diagnostic Tools Required:

Basic hand tools, torque wrench, feeler gauges, multimeter, spark plug gap tool, carburetor synchronizer (recommended).

📊 Manual Specifications

File Format:

PDF

Searchable:

Yes (typically PDF format allows for text searching)

Print Quality:

High Resolution (suitable for printing clear diagrams and text)

Printable:

Yes (designed to be printable for workshop use)

Binding Type:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Type:

Four-stroke, Inline-twin cylinder, DOHC

Displacement:

248 cc (15.1 cu in)

Bore X Stroke:

Approx. 54.0 mm x 54.0 mm (typical for this displacement range)

Compression Ratio:

Typically around 9.5:1 to 10.5:1

Cooling System:

Air-cooled

Valve Actuation:

Dual Overhead Camshaft (DOHC), Chain Driven

Ignition Timing:

Details provided in manual (typically fixed ignition timing for this era)

Horsepower Rating:

Estimated 25-30 HP (at crankshaft)

Torque Rating:

Estimated 20-25 Nm (at crankshaft)

Fuel Delivery:

Carburetor

Carburetor Type:

Likely dual Mikuni VM26 or similar constant velocity carburetors

Fuel Type:

Unleaded Gasoline (Octane rating as per Yamaha specification, likely 91 RON)

Oil Type:

Yamalube or equivalent API SG or higher, SAE 10W-40 or 20W-40 (specifics in manual)

Oil Capacity:

Approx. 1.8 - 2.2 Liters (with filter change)

🔧 Transmission

Transmission Type:

Constant Mesh, 6-speed

Clutch Type:

Wet, Multiple Disc

Drive Type:

Chain Drive

Gear Ratios:

Detailed in manual (specific ratios for each gear)

Transmission Oil Type:

API GL-4 SAE 80W or 90 (specifics in manual)

Transmission Oil Capacity:

Approx. 0.5 - 0.8 Liters

📐 Dimensions

Overall Length:

Approx. 2000-2100 mm (typical for 250cc class)

Overall Width:

Approx. 700-750 mm

Overall Height:

Approx. 1100-1150 mm (to top of handlebars)

Dry Weight:

Approx. 150-160 kg

Wet Weight:

Approx. 165-175 kg (with fluids)

Fuel Tank Capacity:

Approx. 12-14 Liters

Seat Height:

Approx. 780-800 mm

Cargo Capacity:

N/A (Motorcycle)

🛡️ Safety Features

Safety Ratings:

N/A (Motorcycle safety is assessed via mechanical integrity and rider skill, not crash test ratings like cars)

Active Features:

Dual-piston front brake caliper, Single-piston rear brake caliper, integrated lighting system (headlight, taillight, turn signals)

Passive Features:

Reinforced steel frame, durable bodywork, rider footpegs, handlebar grips

💡 Technology Features

Infotainment Features:

Analog instrumentation (speedometer, tachometer, odometer, neutral indicator, turn signal indicators).

Driver Assistance Features:

N/A (Motorcycle)

Connectivity Features:

N/A (Motorcycle)

🔧 Maintenance

Oil Change Interval:

Every 3,000-5,000 km or 6-12 months (refer to manual for exact OEM recommendations)

Air Filter Cleaning Interval:

Every 3,000-5,000 km (or as per manual)

Spark Plug Replacement Interval:

Every 10,000-15,000 km

Valve Clearance Check Interval:

Every 10,000-15,000 km

Brake Fluid Type:

DOT 3 or DOT 4 (refer to manual for exact specification)

Coolant Type:

N/A (Air-cooled engine)

Fork Oil Type:

Yamaha Fork Oil or equivalent, SAE 10W or 15W (specific viscosity and quantity detailed in manual)

Chain Lube:

High-quality motorcycle chain lubricant

Common Issues:

Carburetor synchronization, aging fuel lines and rubber components, stator or rectifier failure, potential electrical connector corrosion, wear on suspension bushings.

Typical Repairs:

Carburetor rebuilding, ignition system troubleshooting, brake system overhaul, suspension servicing, electrical system inspection.

📚 Vehicle History

Brand Heritage:

Yamaha Motor Company, established in 1955, has a rich history in motorcycle manufacturing, known for innovation, performance, and reliability across various motorcycle segments.

Model Evolution:

The BR250F was part of Yamaha's mid-range sport/standard motorcycle lineup in the early 1980s, evolving from earlier twin-cylinder designs and preceding more technologically advanced models.

Production Years:

Likely produced for a limited period in the early to mid-1980s.

Manufacturing Location:

Japan (Typical for Yamaha motorcycles of this era)