Yamaha BR250F 1981-1989 Service Repair Manual

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Basic Information Identification Make: Yamaha Model: BR250F Model Nickname: XJ250 (some export markets), FZX250 (Japan) Production Years Covered: 1981-1989 Introduction Market Position Segment: Entry-level to mid-range sport/standard motorcycle. Target Audience:...

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类型: Motorcycle

斯库: 6859

标签: 1981 1982 1983 1984 1985 1986 1987 1988 1989 Apex Models BR250F Motorcycle Powersports Snowmobiles Yamaha

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Description

Basic Information
Identification
Make:	Yamaha
Model:	BR250F
Model Nickname:	XJ250 (some export markets), FZX250 (Japan)
Production Years Covered:	1981-1989

Introduction
Market Position
Segment:	Entry-level to mid-range sport/standard motorcycle.
Target Audience:	New riders, budget-conscious enthusiasts, owners seeking reliable repair information.
Competitive Analysis
Key Competitors Era:	Honda CBX250/CB250RS, Kawasaki GPZ250/Z250, Suzuki GS250/GSX250.
Key Features
Engineering Philosophy:	Yamaha's reputation for reliable, user-friendly engines and a sporty chassis.
Manual Value Proposition:	Empowers owners to perform a wide range of maintenance and repairs, reducing reliance on costly dealership services.

Manual Details
Coverage Areas
Engine:	Full coverage
Transmission:	Full coverage
Chassis:	Full coverage
Electrical System:	Full coverage
Bodywork And Trim:	Full coverage
Suspension:	Full coverage
Brakes:	Full coverage
Wheels And Tires:	Full coverage
Fuel System:	Full coverage
Cooling System:	Full coverage
Exhaust System:	Full coverage
Troubleshooting Guides:	Comprehensive
Maintenance Schedules:	Detailed
Page Count
Estimated Pages:	300-400
Manual Type
Type:	Service and Repair Manual
Purpose:	Repair, maintenance, troubleshooting, diagnostics
Language
Language:	English
Format
Format:	PDF Download
File Quality:	High-resolution, searchable text, printable

Manual Coverage
Systems Covered
Engine Mechanical:	Disassembly, inspection, assembly, torque specifications, valve timing, piston and cylinder details, crankshaft and connecting rod service.
Engine Fuel System:	Carburetor (Mikuni VM series) overhaul, adjustment, jetting, fuel pump, fuel filter, fuel tank and lines.
Engine Ignition System:	CDI ignition system, spark plug specifications, ignition timing, coil testing, stator and rotor inspection.
Engine Cooling System:	Air-cooled engine principles, oil cooler circuit, oil specifications and change intervals.
Transmission Gearbox:	Gearbox disassembly, inspection, clutch operation, shift mechanism, transmission fluid type and capacity.
Electrical System:	Wiring diagrams, component identification, battery maintenance, starter motor, alternator, lighting system, horn, switches, fuses.
Chassis Frame:	Frame inspection, headstock bearing service, general chassis integrity checks.
Suspension Front:	Telescopic fork service, seal replacement, oil type and level, spring rates, damping adjustments.
Suspension Rear:	Monoshock suspension system, linkage service, shock absorber overhaul, spring pre-load adjustment.
Brakes Front:	Disc brake system, caliper service, pad replacement, fluid type (DOT 3/4), bleeding procedure, master cylinder overhaul.
Brakes Rear:	Drum brake system, shoe replacement, adjustment, brake cable service.
Wheels Tires:	Wheel bearing service, spoke tensioning, tire pressure specifications, recommended tire sizes.
Bodywork Fairings:	Fairing removal and installation, seat service, fuel tank removal and installation, side cover access.
Procedures Included
Routine Maintenance:	Oil changes, filter replacements, chain lubrication and adjustment, spark plug checks, air filter cleaning/replacement, brake adjustments.
Engine Rebuild:	Complete engine disassembly, component inspection, replacement of wear items (rings, gaskets, seals), reassembly with torque specifications.
Carburetor Tuning:	Detailed steps for cleaning, rebuilding, and synchronizing carburetors for optimal performance and fuel efficiency.
Suspension Servicing:	Fork seal replacement, fork oil change, rear shock absorber maintenance.
Brake Bleeding:	Step-by-step instructions for bleeding hydraulic brake systems.
Electrical Diagnostics:	Troubleshooting common electrical faults using wiring diagrams and multimeter testing.
Troubleshooting Common Issues:	Diagnosis and repair of starting problems, running issues, electrical gremlins, braking performance issues.
Technical Depth
Depth:	Comprehensive: Covers everything from basic rider maintenance to full engine and transmission overhauls.
Diagnostic Level:	Advanced diagnostic procedures and specifications for all major systems.
Specifications Detail:	Includes all essential torque values, clearances, fluid capacities, electrical resistance values, and timing data.

Manual Specifications
File Format
File Type:	PDF
Searchability:	Fully searchable text
Print Quality
Printability:	Printable on standard printers
Binding Type
Digital Binding:	N/A (Digital PDF)
Paper Type
Digital Paper Simulation:	N/A (Digital PDF)

Engine Specifications
Primary Engine
Engine Type:	Four-stroke, SOHC, parallel-twin
Displacement:	249 cc
Bore X Stroke:	54.0 mm x 54.0 mm
Compression Ratio:	9.5:1
Cooling System:	Air-cooled
Performance
Horsepower Approx:	26-30 hp (at 9,000 rpm, depending on market and specific model year)
Torque Approx:	20-22 Nm (at 7,000 rpm, depending on market and specific model year)
Fuel System
Carburetor Type:	Dual Mikuni VM22SS (or similar VM series)
Fuel Delivery:	Carbureted
Fuel Tank Capacity:	Approx. 13 Liters (3.4 US gal)

Transmission
Standard
Type:	Constant mesh, 6-speed sequential
Clutch Type:	Wet, multiple disc
Drive Type:	Chain drive
Features
Gear Ratios:	Specific ratios detailed in manual (e.g., 1st: 2.750, 2nd: 1.875, 3rd: 1.375, 4th: 1.136, 5th: 0.960, 6th: 0.833)
Transmission Fluid Type:	Yamalube Gear Oil or equivalent SAE 10W-30 API SG or higher.

Dimensions
Exterior
Overall Length:	Approx. 2050 mm (80.7 in)
Overall Width:	Approx. 745 mm (29.3 in)
Overall Height:	Approx. 1125 mm (44.3 in)
Wheelbase:	Approx. 1350 mm (53.1 in)
Weights
Dry Weight:	Approx. 140-145 kg (309-320 lbs)
Wet Weight:	Approx. 155-160 kg (342-353 lbs) (estimated with fluids)

Safety Features
Ratings
Safety Compliance:	Meets relevant safety standards of its era for motorcycle design.
Active Features
Braking System Type:	Front disc, Rear drum (designed for effective, predictable stopping).
Suspension Design:	Monoshock rear and telescopic front suspension for stable handling.
Passive Features
Frame Construction:	Steel frame provides robust structural integrity.
Lighting:	Headlight, taillight, turn signals for visibility.

Technology Features
Infotainment
Infotainment System:	N/A (Basic motorcycle instrumentation)
Driver Assistance
Rider Aids:	None (Mechanical systems only)
Connectivity
Connectivity Features:	None

Maintenance
Service Intervals
Engine Oil Change:	Every 3,000-5,000 km (1,800-3,000 miles) or 6 months, whichever comes first.
Oil Filter Change:	Every engine oil change.
Spark Plug Check:	Every 6,000-10,000 km (3,700-6,200 miles).
Air Filter Cleaning:	Every 3,000-6,000 km (1,800-3,700 miles).
Chain Lubrication:	Every 500-1,000 km (300-600 miles) and after washing or riding in rain.
Brake Fluid Change:	Every 2 years.
Fluid Specifications
Engine Oil Type:	Yamalube 4 (or equivalent) SAE 10W-40 API SE, SF, or SG.
Engine Oil Capacity:	Approx. 1.8 Liters (1.9 US qt) without filter change; 2.0 Liters (2.1 US qt) with filter change.
Brake Fluid Type:	DOT 3 or DOT 4.
Fork Oil Type:	Yamaha Fork Oil 10W or equivalent.
Fork Oil Capacity:	Approx. 170 ml (5.7 US fl oz) per fork leg.
Known Issues
Carburetor Performance:	Mikuni VM carburetors can be sensitive to dirt and require regular cleaning and adjustment to maintain optimal running.
Electrical Connections:	Corrosion in electrical connectors, especially on older units, can lead to intermittent issues.
Fork Seals:	Like many bikes of this era, fork seals can degrade over time, leading to leaks.
Common Checks
Chain Tension:	Crucial for drivetrain longevity and rider safety; requires periodic adjustment.

Vehicle History
Brand Heritage
Yamaha Motorcycles:	Yamaha has a long and successful history in motorcycle manufacturing, known for innovation and performance across various segments.
Model Evolution
Br250F Lineage:	The BR250F was part of Yamaha's popular 250cc segment, offering a balance of performance, economy, and reliability. It evolved from earlier 250cc parallel-twins and paved the way for future models with similar engine configurations.
Production
Manufacturing Location:	Japan
Market Focus:	Primarily targeted at the Japanese domestic market (as FZX250) and export markets requiring a versatile 250cc sport-standard.

Awards & Recognition
Recognitions
Industry Awards:	While specific awards for the BR250F might not be widely documented, Yamaha motorcycles of this era were generally well-regarded for their build quality and performance relative to their class.
Ratings
Reliability Reputation:	Yamaha's parallel-twin engines from this period are known for their robustness and reliability when properly maintained.