Repair Manual book Yamaha DS7 RD250 R5C RD350 1972 1973 contains maintenance schedule and the repair procedures you need.
The Repair Manual for Yamaha DS7 RD250 R5C RD350 contains:
Yamaha Autolube
Cylinder Porting
Engine
Chassis
Electrical
Appendix
Buy now the Repair Manual Yamaha DS7 RD250 R5C RD350 1972 1973