Yamaha RD250 RD350 1973 - 75 Replacement Wiring Loom Connectors 3 Way CDI / Generator Yamaha LC Wiring Male Harness ConnectorWire Diagram 1973 Yamaha Rd250 - Free Motorcycle Manuals for download . Lots of people charge for motorcycle service and workshop manuals online which is a bit cheeky I reckon as they are freely available all over the internet. £5 each online or download them in PDF format for free here!!. Members bike. RENOVATION PROJECT OF 1972 YAMAHA YR5 BY STEPHAN MORRIS. Parts 1-7. The R5 is a complete redesign from the previous R3 model, with very few common parts, and the last model before reed valves and disc brakes were introduced on the RD350A model in 1973..