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Yamaha

Yamaha DS7(72) RD250(73) R5C(72) RD350(73) Repair Manual

Yamaha DS7(72) RD250(73) R5C(72) RD350(73) Repair Manual

$16.99
$16.99
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Vehicle data plateRef 193583
Brand
Yamaha
Vehicle
Marine
Models covered
DS7, R5C, RD250, RD350, Sterndrive
Years
1972, 1973
Format
PDF, searchable, print-ready
Delivery
Instant download after checkout
Language
English

What happens after you pay

  • Download link opens on the order page immediately
  • The same link is emailed to you — re-download any time
  • Open on phone, tablet or PC; print only the pages you need
  • Not sure it covers your model year? Ask us before you buy
🏷️ Basic Information
Identification
Make:
Yamaha
Model:
RD250/RD350
Model Variants:
DS7 (1972), R5C (1972), RD250 (1973), RD350 (1973)
Years Covered:
1972, 1973
Codes
Model Codes:
DS7, R5C, RD250, RD350
👋 Introduction
Market Position
Vehicle Class:
Performance-oriented, air-cooled, two-stroke parallel-twin motorcycles.
Competitive Analysis
Competitors:
Suzuki GT series, Kawasaki H series, Honda CB series (two-stroke variants of the era).
Key Features
Engine Technology:
Advanced porting (5-port and 7-port reed valve 'Torque Induction System'), Autolube oil injection.
Performance Focus:
Designed for sport riding and spirited performance, particularly the RD models.
Manual Value Proposition
Convenience:
Instant download, no shipping costs, immediate access to critical repair data.
📋 Manual Details
Coverage Areas
Manual Coverage Scope:
Comprehensive service and repair information for specific Yamaha motorcycle models.
Page Count
Total Pages:
113
Manual Type
Manual Type:
Repair Manual / Service Manual
Language
Language:
English
Format
Format:
Digital Download (PDF implied by description)
📖 Manual Coverage
Systems Covered
Powertrain:
Engine, Transmission, Crankcase, Crankshaft, Clutch, Primary Drive, Kick Starter, Shifter, Tachometer Gear
Fuel System:
Carburetor, Air Cleaner, Autolube System (Separate Automatic Lubrication)
Chassis And Suspension:
Front Fork, Rear Cushion, Steering Head, Rear Arm, Fuel Tank
Wheels And Brakes:
Front Wheel (R5C, DS7, RD250), Front Wheel (RD350), Rear Wheel Disc Brake (RD350), Rear Wheel Sprocket, Tires, Tire Inflation
Electrical System:
Charging System, Ignition System
Engine Design:
Cylinder Porting (5-Port and 7-Port Reed Valve), Torque Induction System, Yamaha Reed Valve Operation
Procedures Included
Engine Disassembly And Assembly:
Engine Removal, Cylinder Head, Cylinder, Piston, Piston Rings, Piston Pin, Crankcase Splitting, Crankshaft Installation/Removal, Bearing Removal Notes
Drivetrain Maintenance:
Clutch Removal/Installation, Primary Drive Gear, Drive Sprocket Replacement, Rear Wheel Sprocket Replacement
Suspension And Steering Service:
Front Fork Service, Rear Cushion Service, Steering Head Bearing Service
Wheel And Tire Service:
Wheel Removal/Installation, Tire Replacement, Tire Inflation Specifications
Electrical Diagnostics And Repair:
Charging System Servicing, Ignition System Troubleshooting and Repair
Lubrication System Service:
Yamaha Autolube System: Features, Oil Pump Handling, Oil Pump Maintenance
Technical Depth
Diagnostic Capabilities:
Detailed troubleshooting guidance for engine, chassis, and electrical systems.
Rebuild Completeness:
Covers complete engine disassembly, inspection, and reassembly, as well as chassis component overhauls.
Special Procedures:
Specific instructions for cylinder porting analysis, torque induction system operation, and reed valve system.
📊 Manual Specifications
File Format
Digital Format:
PDF (implied, suitable for instant download and digital delivery)
Print Quality
Document Quality:
High-quality digital reproduction of original factory documentation.
Binding Type
Physical Binding:
N/A (Digital Product)
Paper Type
Physical Paper:
N/A (Digital Product)
⚙️ Engine Specifications
Primary Engine
Engine Type:
Air-cooled, two-stroke, parallel-twin
Engine Variants
Rd250/Ds7/R5C:
247cc (approximate, based on bore increase for R5's)
Rd350:
347cc (approximate, based on bore increase)
Performance
Power Delivery:
Known for strong mid-range and top-end power delivery characteristic of performance two-strokes.
Fuel System
Carburetion:
Dual Mikuni VM carburetors (specific size varies by model, typically 24-28mm).
Lubrication
Autolube System:
Yamaha Autolube, a separate automatic lubrication system delivering premixed oil to the crankcase.
Cooling System
Cooling Method:
Air-cooled
Engine Design Features
Reed Valve Induction:
Utilizes a reed valve system for improved intake charge control and performance, especially in the 7-port 'Torque Induction' models.
🔧 Transmission
Standard
Gearbox Type:
Constant mesh, 5-speed sequential manual transmission.
Features
Drive System:
Chain drive to the rear wheel.
Primary Drive:
Gears (specific ratio differs between R5 and RD models due to performance tuning).
📐 Dimensions
Exterior
Wheelbase:
Refer to specific model specifications within the manual; typically around 53-55 inches.
Weights
Dry Weight:
Varies by model, generally in the range of 300-350 lbs (136-159 kg).
🛡️ Safety Features
Ratings
Crash Test Data:
N/A (Historical motorcycle, no modern crash ratings apply).
Active Features
Braking System:
Front: Disc brake (RD350), Drum brake (R5C, DS7, RD250). Rear: Drum brake.
Passive Features
Frame Construction:
Steel cradle frame.
💡 Technology Features
Infotainment
Features:
N/A (Basic motorcycle technology of the era).
Driver Assistance
Features:
N/A
Connectivity
Features:
N/A
🔧 Maintenance
Service Intervals
Oil Change Recommendations:
Refer to manual for specific intervals for engine oil, gearbox oil (if applicable, though often premix is used for engine lubrication in two-strokes).
Tune Up Intervals:
Regular spark plug checks, carburetor adjustments, and chain lubrication are critical.
Fluid Specifications
Autolube Oil:
Yamaha recommends specific 2-stroke engine oils designed for Autolube systems. Consult the manual for exact specifications and approved brands.
Gearbox Oil:
Yamaha recommends Yamalube gear oil or equivalent. Capacity and viscosity (e.g., SAE 80) typically specified.
Known Issues
Two Stroke Wear:
Piston ring and cylinder wear is common due to high operating temperatures and stresses of two-stroke engines.
Carburetor Tuning:
Carburetors may require frequent adjustment due to atmospheric conditions and engine wear.
Autolube System Reliability:
The Autolube pump and its internal mechanisms can wear, potentially leading to under-lubrication if not maintained. Regular inspection and correct oil are key.
Clutch Wear:
Clutch wear is typical for performance motorcycles, requiring periodic adjustment and replacement of friction plates.
📚 Vehicle History
Brand Heritage
Yamaha Legacy:
Yamaha's reputation for performance and innovative two-stroke technology in the motorcycle industry.
Model Evolution
R5 To Rd Transition:
The R5 series laid the groundwork for the RD series, with the RD models representing an evolution in performance, handling, and engine technology (e.g., 7-port 'Torque Induction').
Production
Manufacturing Location:
Japan
Original Release Period:
Early 1970s (1972-1973 for these specific models).
🏆 Awards & Recognition
Recognitions
Market Reputation:
Highly regarded for performance and handling, establishing Yamaha's sportbike credentials.
Ratings
User Satisfaction:
Consistently praised by riders for their exciting performance and distinctive sound.

Delivery & file format

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Check the model year and engine before you buy

Manufacturers change procedures, wiring and part numbers between model years and engine options. If your VIN plate shows a year or engine code that is not listed on the data plate above, contact us with the model, year and VIN and we will confirm coverage before you order.

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