For 1972 the R5 moved into a broader volume. The code is R5C and the Yamaha part number is LIT-11613-60-20, a reference that also takes in the DS7, RD250 and RD350 across the 1972 and 1973 model years.
Yamaha grouped those machines because much of the service work overlaps. A shared assembly is described once, and the differences between the R5C and its stablemates are marked where they occur, which is helpful when parts have been mixed between models over the years.
What the book supports
Torque values for fasteners, clearances and adjustment settings stated as measurements, a defined stripdown and rebuild order, wiring diagrams for the electrical system, and troubleshooting that starts from a symptom.
Confirm R5C on your own machine, then work from LIT-11613-60-20.
