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2012 Yamaha PW 50 Service Repair Manual
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🏷️ Basic Information Identification Make: Yamaha Model: PW 50 Year: 2012 Product Type: Service Repair Manual Codes Chassis Code: JYVP031 👋 Introduction Market Position Vehicle Segment: Entry-level youth off-road motorcycle,...
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🏷️ Basic Information
Identification
Make:
Yamaha
Model:
PW 50
Year:
2012
Product Type:
Service Repair Manual
Codes
Chassis Code:
JYVP031
👋 Introduction
Market Position
Vehicle Segment:
Entry-level youth off-road motorcycle, often used as a first 'step-up' bike after smaller pit bikes or for casual trail riding.
Competitive Analysis
Competitors:
Honda CRF50F, Suzuki JR50, Kawasaki KX65 (though the KX65 is a geared 2-stroke, it often competes for similar riders graduating from automatic bikes).
Key Features
Unique Selling Points:
Simple, reliable, automatic transmission, low seat height, forgiving power delivery, renowned Yamaha durability.
Manual Value
Coverage Statement:
This manual provides essential diagnostic and repair information to keep the 2012 Yamaha PW 50 running at its best, empowering owners and technicians with the knowledge for maintenance and repairs.
📋 Manual Details
Coverage Areas
Main Systems:
Engine, Drivetrain, Chassis, Electrical, Bodywork, Suspension, Brakes, Fuel System, Ignition System
Page Count
Estimated Pages:
150-250
Manual Type
Type:
Service and Repair Manual
Language
Language:
English
Format
File Format:
PDF
📖 Manual Coverage
Systems Covered
Engine Mechanical:
Top-end overhaul (cylinder, piston, rings, connecting rod), bottom-end assembly (crankshaft, bearings, seals), decarbonization, gasket replacement, cooling system (air-cooled).
Fuel System:
Carburetor disassembly, cleaning, adjustment, float height, jetting, fuel tank, fuel line, fuel filter replacement.
Ignition System:
CDI unit testing, spark plug selection and gap, ignition coil testing, stator and rotor inspection.
Drivetrain:
Automatic transmission (torque converter, clutch), final drive (sprocket, chain wear and adjustment), gearbox lubrication.
Chassis And Suspension:
Front fork inspection, seal replacement, oil levels, rear shock absorber inspection and replacement, swingarm bearing service, steering head bearing adjustment.
Brakes:
Front and rear drum brake inspection, adjustment, shoe replacement, brake lever adjustment.
Electrical System:
Wiring diagrams, lighting system (headlight, taillight, brake light), horn operation, battery maintenance and charging (if applicable to model variant).
Procedures Included
Routine Maintenance:
Oil changes, air filter cleaning/replacement, spark plug replacement, chain lubrication and adjustment, brake adjustment, general inspection.
Troubleshooting:
Diagnostic charts for common starting issues, poor performance, engine noise, electrical faults, and drivability problems.
Repair And Rebuild:
Step-by-step instructions for component disassembly, repair, reassembly, and adjustment for all major vehicle systems.
Technical Specifications:
Detailed torque values for all fasteners, fluid capacities, clearances, and measurements for engine and chassis components.
Technical Depth
Depth:
Comprehensive coverage from basic rider maintenance to complete engine and chassis overhauls, including diagnostic procedures.
📊 Manual Specifications
File Format
Compatibility:
All versions of Windows, Mac, and Linux
Print Quality
Printability:
Yes
Binding Type
Binding:
Digital PDF (Printable)
Paper Type
Paper Quality:
N/A (Digital Format)
Download
Download Method:
Instant High-Speed Download
Requirements
Software Required:
Adobe PDF Reader
⚙️ Engine Specifications
Primary Engine
Engine Type:
2-stroke, air-cooled, single-cylinder
Displacement:
49cc
Bore X Stroke:
39.0 mm x 41.4 mm
Compression Ratio:
6.0:1
Engine Oil Type:
Yamalube 2-stroke oil (or equivalent API TC rated)
Performance
Horsepower Estimate:
Approx. 3.5 HP @ 6,000 RPM (Varies by specific tuning and emissions controls)
Torque Estimate:
Approx. 2.5 lb-ft @ 5,000 RPM
Fuel System
Carburetor Model:
Mikuni VM10-1
Fuel Type:
Unleaded gasoline
Fuel Mixture:
50:1 ratio of gasoline to 2-stroke oil
Ignition System
Ignition Type:
CDI (Capacitor Discharge Ignition)
Cooling System
Cooling Method:
Forced Air Cooling
🔧 Transmission
Standard
Transmission Type:
Automatic (Centrifugal Clutch)
Drive Type:
Chain Drive
Features
Gear Selection:
Forward, Neutral
Gear Ratios
Primary Reduction:
2.500 (25/10)
Secondary Reduction:
3.200 (32/10) - Final Drive
📐 Dimensions
Exterior
Overall Length:
1245 mm (49.0 in)
Overall Width:
670 mm (26.4 in)
Overall Height:
780 mm (30.7 in)
Seat Height:
565 mm (22.2 in)
Wheelbase:
840 mm (33.1 in)
Weights
Dry Weight:
38 kg (83.8 lbs)
Fuel Tank Capacity:
1.0 L (0.26 US gal)
Chassis
Front Tire:
120/80-12 23F
Rear Tire:
120/80-12 23F
Front Brake:
Drum
Rear Brake:
Drum
Front Suspension:
Telescopic fork
Rear Suspension:
Swingarm (Monoshock)
🛡️ Safety Features
Ratings
Design Intent:
Designed for youth riders, emphasizing ease of use and safety features inherent to its automatic transmission and low-speed design.
Active Features
Throttle Limiter:
Adjustable throttle stop screw (for limiting max speed)
Engine Braking:
Characteristic 2-stroke engine braking, managed by automatic transmission.
Passive Features
Low Seat Height:
Allows riders to easily place feet on the ground for stability.
Impact ABSorbing Pads:
Handlebar and stem padding for rider protection.
💡 Technology Features
Infotainment
Features:
N/A (Basic off-road motorcycle, focused on function over features).
Driver Assistance
Features:
N/A (No electronic rider aids).
🔧 Maintenance
Service Intervals
Oil Change Interval:
Every 500 km (300 miles) or annually, whichever comes first. Also check fuel/oil mix ratio.
Air Filter Cleaning:
Every 100 km (60 miles) or as needed based on riding conditions. Wash with mild soap and water, then lightly oil.
Spark Plug Replacement:
As needed, or every 1000 km (600 miles). Recommended: NGK BR6HS or equivalent.
Chain Lubrication Adjustment:
Every 100 km (60 miles). Check for proper slack (10-20mm).
Brake Adjustment:
As needed, check for proper lever feel and full shoe engagement.
Fluid Specifications
Transmission Oil:
Yamalube Gear Oil (or equivalent SAE 80 GL-4 transmission oil). Capacity: 0.6 L (0.63 US qt).
Fork Oil Type:
Yamaha Fork Oil (or equivalent SAE 10W fork oil)
Fork Oil Capacity:
112 ml (3.79 US fl oz) per leg
Known Issues
Carburetor Clogging:
Frequent issue due to small fuel passages and sediment; requires regular cleaning.
Throttle Cable Wear:
Can become stiff or seize, affecting throttle operation; lubrication and replacement are key.
Clutch Slippage:
Can occur with heavy use or worn clutch shoes/springs; requires inspection and potential replacement.
Drive Chain Adjustment:
Needs frequent checks due to stretching, especially with younger riders who may not maintain consistent technique.
📚 Vehicle History
Brand Heritage
Manufacturer:
Yamaha Motor Company, Ltd.
Heritage Focus:
Known for innovation in motorcycles, musical instruments, and marine products, with a strong legacy in motorsports.
Model Evolution
Pw50 Introduction:
The PW50 (originally the Yamaha Yzinger) was introduced in the early 1980s and has remained largely unchanged due to its effective and user-friendly design for young riders.
Evolution Focus:
Minor updates typically relate to emissions compliance, graphics, and color schemes rather than fundamental mechanical changes.
Production
Production Years:
1981 - Present
Production Location:
Primarily Japan and Taiwan
🏆 Awards & Recognition
Recognitions
Industry Recognition:
Consistently recognized as one of the best entry-level off-road motorcycles for teaching young riders the fundamentals of motorcycle operation.
Ratings
Durability Rating:
Excellent. The PW50 is renowned for its robustness and ability to withstand rough use by young riders.
Certifications
Emission Standards:
Designed to meet the emission standards applicable to its production year and market.