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2007 Yamaha YZ125 Workshop Repair Manual All ONWARDS ModelS COVERED

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🏷️ Basic Information Identification Make: Yamaha Model: YZ125 Model Variant: YZ125 (2-stroke motocross) Years Covered: 2007 and all onwards models Vehicle Type: 2-stroke motocross motorcycle 👋 Introduction Market Position Target...
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Typ: Motorcycle
Dodavatel:
SKU: 270307
2007 Yamaha YZ125 Workshop Repair Manual All ONWARDS ModelS COVERED
🏷️ Basic Information
Identification
Make:
Yamaha
Model:
YZ125
Model Variant:
YZ125 (2-stroke motocross)
Years Covered:
2007 and all onwards models
Vehicle Type:
2-stroke motocross motorcycle
👋 Introduction
Market Position
Target Audience:
Motocross racers, off-road riders, and owners servicing their own bikes
Class:
125cc two-stroke motocross competition motorcycle
Key Advantages
Competitive Advantage:
Lightweight chassis, lively 125cc two-stroke powerband, proven Yamaha YPVS power valve system
Key Features:
Liquid-cooled engine, Keihin carburetor, adjustable Kayaba suspension, close-ratio 6-speed gearbox
📋 Manual Details
Manual Information
Coverage Areas:
Complete service, repair, and rebuild procedures for 2007+ YZ125
Manual Type:
Workshop Service Repair Manual
Language:
English
Format:
PDF
Delivery Method:
Instant digital download
Page Count:
N/A - not specified for this model
Binding:
Digital PDF
📖 Manual Coverage
Systems Covered
Engine:
Complete teardown, inspection, and rebuild of the 124cc two-stroke engine
Fuel System:
Carburetor removal, disassembly, jetting, and tuning
Cooling System:
Radiator, hoses, pump, and coolant service
Ignition System:
CDI unit, ignition coil, spark plug, and stator testing
Transmission:
6-speed gearbox disassembly, shift mechanism, and clutch service
Exhaust and Power Valve:
YPVS power valve service and exhaust system removal
Lubrication:
Premix oil system specifications and fuel/oil ratio guidance
Front Suspension:
Fork disassembly, seal replacement, and adjustment
Rear Suspension:
Shock service, linkage bearings, and swingarm service
Wheels and Brakes:
Wheel truing, spoke service, disc and pad replacement
Steering:
Steering head bearings and handlebar alignment
Electrical:
Wiring diagrams, connectors, and component testing
Frame and Body:
Frame inspection, plastics, and seat removal
Procedures Included
Scheduled Maintenance:
Full service interval charts and step-by-step procedures
Diagnostics:
Troubleshooting charts for engine, chassis, and electrical faults
Torque Specifications:
Complete torque values for fasteners throughout the machine
Special Tools:
Required and recommended special tools listed per procedure
Technical Detail
Technical Depth:
Workshop-level detail suitable for professional technicians and experienced DIY owners
Illustrations:
Diagrams, exploded views, and photographs supporting each procedure
📊 Manual Specifications
File & Compatibility
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print & Binding
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
⚙️ Engine Specifications
Engine
Primary Engine:
124cc liquid-cooled 2-stroke single cylinder
Bore and Stroke:
54.0 mm x 54.5 mm
Compression Ratio:
N/A - varies with head modification, see manual
Induction:
Case reed valve
Power Valve:
Yamaha YPVS exhaust power valve system
Cooling:
Liquid cooled
Fuel System
Carburetor:
Keihin flat-slide carburetor
Fuel:
Premium unleaded with premix 2-stroke oil
Performance
Gearbox:
6-speed constant mesh close-ratio
🔧 Transmission
Transmission
Standard Transmission:
6-speed constant mesh close-ratio gearbox
Final Drive:
Chain drive
Clutch:
Wet multi-plate manual clutch
Features:
Close-ratio motocross gearing for competition use
📐 Dimensions
Dimensions and Weights
Wheelbase:
Approximately 1,438 mm (56.6 in)
Seat Height:
Approximately 993 mm (39.1 in)
Ground Clearance:
Approximately 347 mm (13.7 in)
Fuel Capacity:
Approximately 6.5 L (1.7 gal)
Curb Weight:
Approximately 87-91 kg (192-200 lb) without fuel, verify in manual
🛡️ Safety Features
Safety Information
Crash Test Rating:
N/A - off-road competition motorcycle, not rated for street use
Brakes:
Hydraulic single disc front and rear
Passive Features:
Designed for use with DOT-approved helmet, goggles, and motocross protective gear
💡 Technology Features
Features
Audio / Infotainment:
N/A - competition off-road motorcycle, no infotainment
Driver Assistance:
N/A - none fitted
Instrumentation:
Minimal competition instrumentation
Ignition Technology:
Digital CDI ignition
🔧 Maintenance
Service and Maintenance
Engine Oil:
2-stroke premix oil mixed with fuel per manual specification
Transmission Oil:
SAE 10W-30 or equivalent motor oil, change per interval
Coolant:
High-quality ethylene glycol antifreeze with corrosion inhibitors
Piston and Rings:
Inspect/replace at frequent intervals for competition use
Fork Oil:
Change per scheduled interval; fork seals inspect regularly
Chain:
Regular cleaning, lubrication, and slack adjustment
Air Filter:
Clean and oil after every ride in dusty conditions
Common Wear Items:
Piston, rings, reeds, clutch plates, brake pads, sprockets, chain, fork seals
📚 Vehicle History
Heritage and Production
Manufacturer:
Yamaha Motor Company, Japan
Model Evolution:
YZ125 introduced in 1974; by 2007 featured aluminum frame, YPVS power valve, and refined Kayaba suspension
Production Location:
Yamaha production facilities; consult manual for market-specific details
🏆 Awards & Recognition
Recognition
Racing Heritage:
Long-established platform in amateur and professional motocross competition
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