YAMAHA DS7(72) RD250 (73) R5C(72) RD350 (73) SERVICE MANUAL – PDF DOWNLOAD
DESCRIPTION:
YAMAHA DS7(72) RD250 (73) R5C(72) RD350 (73) SERVICE MANUAL – PDF DOWNLOAD
FOREWORD
- This Service Manual is a combination of the DSl and R5C Service Manuals originally printed in Japan, September 1972. In essence, it is the R5C Service Manual with appropriate additions for models DSl, RD250, and RD350 .
- All of these models are essentially the same with the R5’s having an increase in bore to account for the larger displacement. Accordingly, the major parts differences between these two models is within those parts affected by the overbore. Additionally, due to the R5’s higher performance, it has been equipped with a different primary ratio and larger rear tire.
- Additional information can be found in the specifications section. Should any questions arise concerning any model, please consult the appropriate model Parts List and/or Service or Parts News Bull etins. ENGINEERING & SERVICE DEPARTMENT YAMAHA MOTOR CO., LTD.
TABLE OF CONTENTS:
YAMAHA DS7(72) RD250 (73) R5C(72) RD350 (73) SERVICE MANUAL – PDF DOWNLOAD
CONTENTS
YAMAHA AUTOLUBE (Separate Automatic Lubrication System)
What is YAMAHA Autolube?
Features of YAMAHA Autolube
1- 3 Handling of the Oil Pump
CHAPTER 2 CYLINDER PORTING
Description of 5-Port Cylinder 5
Construction and Features , 5
The Torque Induction System (7 -port Cylinder Reed Valve System) 8
The Yamaha Reed Valve 9
Operation of the Torque Induction System 10
ENGINE
Removing the Engine – · 12
Cylinder Head 16
Cylinder 16
Piston Pin 18
Piston Ring 19
Piston 20
Crankcase Cover ( R) 21
Clutch · 23
Primary Drive Gear 27
Drive Sprocket · 28
Splitting the Crankcase 30
Crankshaft 31
Transmission 37
Kick Starter 41
Shifter 42
3- 16 Tachometer Gear 47
3-17 Notes on Bearing Removal 48
3-18 Carburetor 49
3-19 Air Cleaner 51
CHAPTER 4 CHASSIS
4- 1 Front Wheel (R5C, DS7 , RD250) 52
4- 2 Front Wheel ( R 0350) : 56
4- 3 Rear Wheel 59
4- 4 Disc Brake (RD350) 73
4- 5 Replacing Tires 75
4- 6 Reer Wheel Sprocket · ‘ 75
4- 7 Tire Inflation 76
4- 8 Front Fork 77
4- 9 Rear Cushion 81
4- 10 Fuel Tank 82
4-11 Rear Arm 82
CHAPTER 5 ELECTRICAL
5- 1 Charging System 86
5- 2 Ignition System 97
APPENDIX
A Conversion Tables 102
B IBM Parts Order System 104
C Circuit Diagrams
D Cable Routing Diagrams
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