This is a service manual for the SR400/SR500. New service manuals are quite expensive. From engine disassembly and assembly methods to detailed wiring diagrams, it covers everything about the SR400/SR500, including detailed tightening torques and appropriate amounts of fluids. This product has some signs of use, but there are no issues with use such as [missing characters] or [missing pages] due to tears. Service manuals and parts lists are very helpful when performing maintenance. Manufacturer: Yamaha Compatible models: SR400/SR500 Model: 1JR-251101～/1JN-216101～ Published: May 1985